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		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=222077</id>
		<title>Topic</title>
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		<updated>2015-12-10T21:30:41Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added topics to geography, astronomy, philosophy, and history&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
{{Expand Topic}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|The Astrolabe&lt;br /&gt;
|The construction and use of the astrolabe&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The height of the tides, the moon and the sun&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory and methods ivolved in evaporation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Liquid Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the beaker&lt;br /&gt;
|-&lt;br /&gt;
|Oil of Vitriol&lt;br /&gt;
|The preparation of oil of vitriol&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the crucible&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory and methods involved in distillation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of laboratory ovens&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&amp;lt;br/&amp;gt;The reasons why the lever is effective&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gear Mechanics&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|-&lt;br /&gt;
|The Glass Lens&lt;br /&gt;
|The construction and use of the glass lens&lt;br /&gt;
|-&lt;br /&gt;
|The Camera Obscura&lt;br /&gt;
|The construction and use of the camera obscura&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of valves&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the bellows&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the straight-beam balance&lt;br /&gt;
|-&lt;br /&gt;
|The Wedge&lt;br /&gt;
|The reasons why the wedge is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of water-based devices to tell time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of lamination&lt;br /&gt;
|-&lt;br /&gt;
|The Wheel-and-axle&lt;br /&gt;
|The reasons why the wheel-and-axle construction is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why pulleys are effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why screws are effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the padlock&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why the lever is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of water-filled sphere as a lens&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of surveying land&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of economic data collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The placement of economic information on maps&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the surveying staff&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process involved in creating maps&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of the formation of deltas at the mouths of rivers&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The placement of geological information on maps&lt;br /&gt;
|}&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Dictionaries&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Comparative Biography&lt;br /&gt;
|The method of compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of examining artifacts to determine how techniques have changed over time&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|Positional notation&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Negative quantities&lt;br /&gt;
|The notation for negative quantities&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of proof by contradiction&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|An algorithm for dividing one number into another, possibly yielding a remainder&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Geometric objects: points, lines, circles, triangles, and so on&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The divergence of the harmonic series&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The properties of similar and congruent triangles&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomical Studies&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Fouled Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of probing&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Cauterization&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Pulmonary medicine&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Remedies prepared from animals&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Value Agendas&lt;br /&gt;
|Writers can push value &amp;quot;agendas&amp;quot; if they are skilled enough.&lt;br /&gt;
&lt;br /&gt;
Description format: The [worthlessness | value | nature] of &amp;amp;#91;[[belief]]&amp;amp;#93;&lt;br /&gt;
&lt;br /&gt;
Examples:&lt;br /&gt;
* The nature of truth - probably related to TRUTH&lt;br /&gt;
* The value of art - probably related to ARTWORK&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Grammar&lt;br /&gt;
|Grammar&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|Education&lt;br /&gt;
|Education, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|-&lt;br /&gt;
|Whole and Parts&lt;br /&gt;
|The relationship between wholes and parts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of etymology&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&amp;lt;!-- Could be Philosophy or Mathematics --&amp;gt;&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&amp;lt;!-- Was Natural Science and Engineering --&amp;gt;&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=222054</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=222054"/>
		<updated>2015-12-10T00:12:28Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added several topics to chemistry, engineering, and mathematics&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
{{Expand Topic}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|The Astrolabe&lt;br /&gt;
|The construction and use of the astrolabe&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory and methods ivolved in evaporation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Liquid Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the beaker&lt;br /&gt;
|-&lt;br /&gt;
|Oil of Vitriol&lt;br /&gt;
|The preparation of oil of vitriol&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the crucible&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory and methods involved in distillation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of laboratory ovens&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&amp;lt;br/&amp;gt;The reasons why the lever is effective&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gear Mechanics&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|-&lt;br /&gt;
|The Glass Lens&lt;br /&gt;
|The construction and use of the glass lens&lt;br /&gt;
|-&lt;br /&gt;
|The Camera Obscura&lt;br /&gt;
|The construction and use of the camera obscura&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of valves&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the bellows&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the straight-beam balance&lt;br /&gt;
|-&lt;br /&gt;
|The Wedge&lt;br /&gt;
|The reasons why the wedge is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of water-based devices to tell time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of lamination&lt;br /&gt;
|-&lt;br /&gt;
|The Wheel-and-axle&lt;br /&gt;
|The reasons why the wheel-and-axle construction is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why pulleys are effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why screws are effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the padlock&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why the lever is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of water-filled sphere as a lens&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of surveying land&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of economic data collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The placement of economic information on maps&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the surveying staff&lt;br /&gt;
|}&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Dictionaries&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Comparative Biography&lt;br /&gt;
|The method of compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|Positional notation&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Negative quantities&lt;br /&gt;
|The notation for negative quantities&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of proof by contradiction&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|An algorithm for dividing one number into another, possibly yielding a remainder&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Geometric objects: points, lines, circles, triangles, and so on&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The divergence of the harmonic series&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The properties of similar and congruent triangles&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomical Studies&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Fouled Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of probing&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Cauterization&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Pulmonary medicine&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Remedies prepared from animals&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Value Agendas&lt;br /&gt;
|Writers can push value &amp;quot;agendas&amp;quot; if they are skilled enough.&lt;br /&gt;
&lt;br /&gt;
Description format: The [worthlessness | value | nature] of &amp;amp;#91;[[belief]]&amp;amp;#93;&lt;br /&gt;
&lt;br /&gt;
Examples:&lt;br /&gt;
* The nature of truth - probably related to TRUTH&lt;br /&gt;
* The value of art - probably related to ARTWORK&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the relationship between wholes and parts&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&amp;lt;!-- Could be Philosophy or Mathematics --&amp;gt;&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&amp;lt;!-- Was Natural Science and Engineering --&amp;gt;&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=222051</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=222051"/>
		<updated>2015-12-09T23:29:50Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added a couple topics to medical science&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
{{Expand Topic}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|The Astrolabe&lt;br /&gt;
|The construction and use of the astrolabe&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Liquid Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the beaker&lt;br /&gt;
|-&lt;br /&gt;
|Oil of Vitriol&lt;br /&gt;
|The preparation of oil of vitriol&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&amp;lt;br/&amp;gt;The reasons why the lever is effective&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gear Mechanics&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|-&lt;br /&gt;
|The Glass Lens&lt;br /&gt;
|The construction and use of the glass lens&lt;br /&gt;
|-&lt;br /&gt;
|The Camera Obscura&lt;br /&gt;
|The construction and use of the camera obscura&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of valves&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the bellows&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the straight-beam balance&lt;br /&gt;
|-&lt;br /&gt;
|The Wedge&lt;br /&gt;
|The reasons why the wedge is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of water-based devices to tell time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of lamination&lt;br /&gt;
|-&lt;br /&gt;
|The Wheel-and-axle&lt;br /&gt;
|The reasons why the wheel-and-axle construction is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why pulleys are effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why screws are effective&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of surveying land&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of economic data collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The placement of economic information on maps&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the surveying staff&lt;br /&gt;
|}&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Dictionaries&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Comparative Biography&lt;br /&gt;
|The method of compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Negative quantities&lt;br /&gt;
|The notation for negative quantities&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomical Studies&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Fouled Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of probing&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Cauterization&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Pulmonary medicine&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Remedies prepared from animals&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Value Agendas&lt;br /&gt;
|Writers can push value &amp;quot;agendas&amp;quot; if they are skilled enough.&lt;br /&gt;
&lt;br /&gt;
Description format: The [worthlessness | value | nature] of &amp;amp;#91;[[belief]]&amp;amp;#93;&lt;br /&gt;
&lt;br /&gt;
Examples:&lt;br /&gt;
* The nature of truth - probably related to TRUTH&lt;br /&gt;
* The value of art - probably related to ARTWORK&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the relationship between wholes and parts&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&amp;lt;!-- Could be Philosophy or Mathematics --&amp;gt;&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&amp;lt;!-- Was Natural Science and Engineering --&amp;gt;&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=222050</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=222050"/>
		<updated>2015-12-09T23:26:40Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added a philosophy topic&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
{{Expand Topic}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|The Astrolabe&lt;br /&gt;
|The construction and use of the astrolabe&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Liquid Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the beaker&lt;br /&gt;
|-&lt;br /&gt;
|Oil of Vitriol&lt;br /&gt;
|The preparation of oil of vitriol&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&amp;lt;br/&amp;gt;The reasons why the lever is effective&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gear Mechanics&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|-&lt;br /&gt;
|The Glass Lens&lt;br /&gt;
|The construction and use of the glass lens&lt;br /&gt;
|-&lt;br /&gt;
|The Camera Obscura&lt;br /&gt;
|The construction and use of the camera obscura&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of valves&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the bellows&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the straight-beam balance&lt;br /&gt;
|-&lt;br /&gt;
|The Wedge&lt;br /&gt;
|The reasons why the wedge is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of water-based devices to tell time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of lamination&lt;br /&gt;
|-&lt;br /&gt;
|The Wheel-and-axle&lt;br /&gt;
|The reasons why the wheel-and-axle construction is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why pulleys are effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why screws are effective&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of surveying land&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of economic data collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The placement of economic information on maps&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the surveying staff&lt;br /&gt;
|}&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Dictionaries&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Comparative Biography&lt;br /&gt;
|The method of compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Negative quantities&lt;br /&gt;
|The notation for negative quantities&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomical Studies&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Fouled Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of probing&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Cauterization&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Value Agendas&lt;br /&gt;
|Writers can push value &amp;quot;agendas&amp;quot; if they are skilled enough.&lt;br /&gt;
&lt;br /&gt;
Description format: The [worthlessness | value | nature] of &amp;amp;#91;[[belief]]&amp;amp;#93;&lt;br /&gt;
&lt;br /&gt;
Examples:&lt;br /&gt;
* The nature of truth - probably related to TRUTH&lt;br /&gt;
* The value of art - probably related to ARTWORK&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the relationship between wholes and parts&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&amp;lt;!-- Could be Philosophy or Mathematics --&amp;gt;&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&amp;lt;!-- Was Natural Science and Engineering --&amp;gt;&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221893</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221893"/>
		<updated>2015-12-05T06:13:04Z</updated>

		<summary type="html">&lt;p&gt;Figwat: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gear Mechanics&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the camera obscura&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of valves&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the bellows&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the straight-beam balance&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why the wedge is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of water-based devices to tell time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of lamination&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why the wheel-and-axle construction is effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why pulleys are effective&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The reasons why screws are effective&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of surveying land&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The process of economic data collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The placement of economic information on maps&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The construction and use of the surveying staff&lt;br /&gt;
|}&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The surgical method of probing&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Cauterization&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Value Agendas&lt;br /&gt;
|Writers can push value &amp;quot;agendas&amp;quot; if they are skilled enough.&lt;br /&gt;
&lt;br /&gt;
Description format: The [worthlessness | value | nature] of &amp;amp;#91;[[belief]]&amp;amp;#93;&lt;br /&gt;
&lt;br /&gt;
Examples:&lt;br /&gt;
* The nature of truth - probably related to TRUTH&lt;br /&gt;
* The value of art - probably related to ARTWORK&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=DF2014_Talk:Topic&amp;diff=221892</id>
		<title>DF2014 Talk:Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=DF2014_Talk:Topic&amp;diff=221892"/>
		<updated>2015-12-05T05:57:30Z</updated>

		<summary type="html">&lt;p&gt;Figwat: /* We aren't even half way there */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;==We aren't even half way there==&lt;br /&gt;
There are around 130 innovations/topics/technologies listed so far. Toady says there are around 300.&lt;br /&gt;
&lt;br /&gt;
Techniques for researching:&lt;br /&gt;
&lt;br /&gt;
* Turn entire Fortress into scholars&lt;br /&gt;
* Monitor what they discuss / ponder every few minutes&lt;br /&gt;
* Record the innovation name and description (Press {{k|j}} when highlighting the dwarf in the unit list to see the description)&lt;br /&gt;
* Might be best to do this in several worlds generated with longer histories&lt;br /&gt;
&lt;br /&gt;
I also went through Legends mode and sorted through a crap load of books (under artifacts), but this way doesn't always give you the innovation name. And it's a pain.&lt;br /&gt;
&lt;br /&gt;
Any other suggestions? [[User:Brightgalrs|Brightgalrs]] ([[User talk:Brightgalrs|talk]]) 16:18, 4 December 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
Writing books in adv mode is also a good way to do it.&lt;br /&gt;
[[User:Untrustedlife|Untrustedlife]] ([[User talk:Untrustedlife|talk]]) 17:07, 4 December 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
:Didn't think of that. Very nice.[[User:Brightgalrs|Brightgalrs]] ([[User talk:Brightgalrs|talk]]) 17:21, 4 December 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
Ah, having not played fortress mode in the new release, I didn't realize that there were official names for the topics. I just thought the name was supposed to briefly describe the topic. I will remove the names from all the topics I have added.&lt;br /&gt;
One good thing about using legends mode is that you know for certain which field a topic is a part of, since it says stuff like, &amp;quot;In 88, Sut became a philosopher in Hawktwinkle.&amp;quot; &amp;quot;In the early summer of 91, Sut independently discovered discourse on medical ethics.&amp;quot; That could have conceivably been a medical science innovation, but obviously since Sut was a philosopher, it is a philosophy inovation. --[[User:Figwat|Figwat]] ([[User talk:Figwat|talk]]) 05:57, 5 December 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
== Reminders ==&lt;br /&gt;
&lt;br /&gt;
* Record both the name and description&lt;br /&gt;
* The description should be all words after &amp;quot;The topic being discussed concerns...&amp;quot; or whatever it is.&lt;br /&gt;
* Try to sort the innovation in the right section of this article&lt;br /&gt;
* If it isn't obvious which it fits under (or it seems fits under multiple) just put it in the &amp;quot;unsorted&amp;quot; section&lt;br /&gt;
* More research will be done when Dwarf Therapist is updated&lt;br /&gt;
** In particular, monitoring dwarf's skill gain to pinpoint the correct branch(s) a topic should be sorted under. &lt;br /&gt;
[[User:Brightgalrs|Brightgalrs]] ([[User talk:Brightgalrs|talk]]) 16:27, 4 December 2015 (UTC)&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=DF2014_Talk:Topic&amp;diff=221891</id>
		<title>DF2014 Talk:Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=DF2014_Talk:Topic&amp;diff=221891"/>
		<updated>2015-12-05T05:56:54Z</updated>

		<summary type="html">&lt;p&gt;Figwat: /* We aren't even half way there */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;==We aren't even half way there==&lt;br /&gt;
There are around 130 innovations/topics/technologies listed so far. Toady says there are around 300.&lt;br /&gt;
&lt;br /&gt;
Techniques for researching:&lt;br /&gt;
&lt;br /&gt;
* Turn entire Fortress into scholars&lt;br /&gt;
* Monitor what they discuss / ponder every few minutes&lt;br /&gt;
* Record the innovation name and description (Press {{k|j}} when highlighting the dwarf in the unit list to see the description)&lt;br /&gt;
* Might be best to do this in several worlds generated with longer histories&lt;br /&gt;
&lt;br /&gt;
I also went through Legends mode and sorted through a crap load of books (under artifacts), but this way doesn't always give you the innovation name. And it's a pain.&lt;br /&gt;
&lt;br /&gt;
Any other suggestions? [[User:Brightgalrs|Brightgalrs]] ([[User talk:Brightgalrs|talk]]) 16:18, 4 December 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
Writing books in adv mode is also a good way to do it.&lt;br /&gt;
[[User:Untrustedlife|Untrustedlife]] ([[User talk:Untrustedlife|talk]]) 17:07, 4 December 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
:Didn't think of that. Very nice.[[User:Brightgalrs|Brightgalrs]] ([[User talk:Brightgalrs|talk]]) 17:21, 4 December 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
Ah, having not played fortress mode in the new release, I didn't realize that there were official names for the topics. I just thought the name was supposed to briefly describe the topic. I will remove the names from all the topics I have added.&lt;br /&gt;
One good thing about using legends mode is that you know for certain which field a topic is a part of, since it says stuff like, &amp;quot;In 88, Sut became a philosopher in Hawktwinkle.&amp;quot; &amp;quot;In the early summer of 91, Sut independently discovered discourse on medical ethics.&amp;quot; That could have conceivably been a medical science innovation, but obviously since Sut was a philosopher, it is a philosophy inovation.&lt;br /&gt;
&lt;br /&gt;
== Reminders ==&lt;br /&gt;
&lt;br /&gt;
* Record both the name and description&lt;br /&gt;
* The description should be all words after &amp;quot;The topic being discussed concerns...&amp;quot; or whatever it is.&lt;br /&gt;
* Try to sort the innovation in the right section of this article&lt;br /&gt;
* If it isn't obvious which it fits under (or it seems fits under multiple) just put it in the &amp;quot;unsorted&amp;quot; section&lt;br /&gt;
* More research will be done when Dwarf Therapist is updated&lt;br /&gt;
** In particular, monitoring dwarf's skill gain to pinpoint the correct branch(s) a topic should be sorted under. &lt;br /&gt;
[[User:Brightgalrs|Brightgalrs]] ([[User talk:Brightgalrs|talk]]) 16:27, 4 December 2015 (UTC)&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221816</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221816"/>
		<updated>2015-12-04T06:44:01Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added several topics to engineering and one to medical science&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Geocentric Model&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|Moon and Tides&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|Celestial Cartography&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|Heliocentric Model&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|Lunar Phase&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|Retort&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|Basicity and Acidity&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gear Mechanics&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|-&lt;br /&gt;
|Camera Obscura&lt;br /&gt;
|The construction and use of the camera obscura&lt;br /&gt;
|-&lt;br /&gt;
|Buoyancy and Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Valves&lt;br /&gt;
|The construction and use of valves&lt;br /&gt;
|-&lt;br /&gt;
|The Bellows&lt;br /&gt;
|The construction and use of the bellows&lt;br /&gt;
|-&lt;br /&gt;
|The Straight-Beam Balance&lt;br /&gt;
|The construction and use of the straight-beam balance&lt;br /&gt;
|-&lt;br /&gt;
|Wedge Mechanics&lt;br /&gt;
|The reasons why the wedge is effective&lt;br /&gt;
|-&lt;br /&gt;
|Water Clocks&lt;br /&gt;
|The use of water-based devices to tell time&lt;br /&gt;
|-&lt;br /&gt;
|Lamination&lt;br /&gt;
|The use of lamination&lt;br /&gt;
|-&lt;br /&gt;
|Wheel Mechanics&lt;br /&gt;
|The reasons why the wheel-and-axle construction is effective&lt;br /&gt;
|-&lt;br /&gt;
|Pulley Mechanics&lt;br /&gt;
|The reasons why pulleys are effective&lt;br /&gt;
|-&lt;br /&gt;
|Screw Mechanics&lt;br /&gt;
|The reasons why screws are effective&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Surveying&lt;br /&gt;
|The process of surveying land&lt;br /&gt;
|-&lt;br /&gt;
|Anemology&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Econometrics&lt;br /&gt;
|The process of economic data collection&lt;br /&gt;
|-&lt;br /&gt;
|Economic Map&lt;br /&gt;
|The placement of economic information on maps&lt;br /&gt;
|-&lt;br /&gt;
|Surveying Staff&lt;br /&gt;
|The construction and use of the surveying staff&lt;br /&gt;
|}&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|-&lt;br /&gt;
|Cauterization&lt;br /&gt;
|Cauterization&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|Theory of justification&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|Horology&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|Philosophy of Mind&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|Martial Ethics&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|Aesthetics&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|Jurisprudence&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Syntactic theory&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|Political science&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Welfare Theory&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|Theory of Events&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|Pedagogy&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|Doxastic Theory&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|Medical ethics&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221815</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221815"/>
		<updated>2015-12-04T06:03:59Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added a couple topics to engineering&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Geocentric Model&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|Moon and Tides&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|Celestial Cartography&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|Heliocentric Model&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|Lunar Phase&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|Retort&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|Basicity and Acidity&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|-&lt;br /&gt;
|Camera Obscura&lt;br /&gt;
|The construction and use of the camera obscura&lt;br /&gt;
|-&lt;br /&gt;
|Buoyancy and Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Surveying&lt;br /&gt;
|The process of surveying land&lt;br /&gt;
|-&lt;br /&gt;
|Anemology&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Econometrics&lt;br /&gt;
|The process of economic data collection&lt;br /&gt;
|-&lt;br /&gt;
|Economic Map&lt;br /&gt;
|The placement of economic information on maps&lt;br /&gt;
|-&lt;br /&gt;
|Surveying Staff&lt;br /&gt;
|The construction and use of the surveying staff&lt;br /&gt;
|}&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|Theory of justification&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|Horology&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|Philosophy of Mind&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|Martial Ethics&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|Aesthetics&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|Jurisprudence&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Syntactic theory&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|Political science&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Welfare Theory&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|Theory of Events&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|Pedagogy&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|Doxastic Theory&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|Medical ethics&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221814</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221814"/>
		<updated>2015-12-04T05:53:08Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Created geography list and added some topics to it&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Geocentric Model&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|Moon and Tides&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|Celestial Cartography&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|Heliocentric Model&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|Lunar Phase&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|Retort&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|Basicity and Acidity&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Surveying&lt;br /&gt;
|The process of surveying land&lt;br /&gt;
|-&lt;br /&gt;
|Anemology&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Econometrics&lt;br /&gt;
|The process of economic data collection&lt;br /&gt;
|-&lt;br /&gt;
|Economic Map&lt;br /&gt;
|The placement of economic information on maps&lt;br /&gt;
|-&lt;br /&gt;
|Surveying Staff&lt;br /&gt;
|The construction and use of the surveying staff&lt;br /&gt;
|}&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|Theory of justification&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|Horology&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|Philosophy of Mind&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|Martial Ethics&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|Aesthetics&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|Jurisprudence&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Syntactic theory&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|Political science&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Welfare Theory&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|Theory of Events&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|Pedagogy&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|Doxastic Theory&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|Medical ethics&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221812</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221812"/>
		<updated>2015-12-04T05:43:07Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added a couple of topics to chemistry&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Geocentric Model&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|Moon and Tides&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|Celestial Cartography&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|Heliocentric Model&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|Lunar Phase&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|-&lt;br /&gt;
|Retort&lt;br /&gt;
|The construction and use of the retort&lt;br /&gt;
|-&lt;br /&gt;
|Basicity and Acidity&lt;br /&gt;
|The classification of alkali and acids&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|Theory of justification&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|Horology&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|Philosophy of Mind&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|Martial Ethics&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|Aesthetics&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|Jurisprudence&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Syntactic theory&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|Political science&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Welfare Theory&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|Theory of Events&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|Pedagogy&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|Doxastic Theory&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|Medical ethics&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221811</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221811"/>
		<updated>2015-12-04T05:31:13Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added to astronomy&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Geocentric Model&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|Moon and Tides&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|Celestial Cartography&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|Heliocentric Model&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|-&lt;br /&gt;
|Lunar Phase&lt;br /&gt;
|The phases of the moon&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|Theory of justification&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|Horology&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|Philosophy of Mind&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|Martial Ethics&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|Aesthetics&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|Jurisprudence&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Syntactic theory&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|Political science&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Welfare Theory&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|Theory of Events&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|Pedagogy&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|Doxastic Theory&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|Medical ethics&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221810</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221810"/>
		<updated>2015-12-04T05:23:56Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added a couple philosophy topics&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Geocentric Model&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|Theory of justification&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|Horology&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|Philosophy of Mind&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|Martial Ethics&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|Aesthetics&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|Jurisprudence&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Syntactic theory&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|Political science&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Welfare Theory&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|Theory of Events&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|Pedagogy&lt;br /&gt;
|Discourse on education&lt;br /&gt;
|-&lt;br /&gt;
|Doxastic Theory&lt;br /&gt;
|Discourse on the nature of belief&lt;br /&gt;
|-&lt;br /&gt;
|Medical ethics&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221809</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221809"/>
		<updated>2015-12-04T05:12:11Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Moved &amp;quot;Medical Ethics&amp;quot; to philosophy; added some philosophy topics&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Discourse on ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|Theory of justification&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|Horology&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|Philosophy of Mind&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|Martial Ethics&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|Aesthetics&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|Jurisprudence&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Syntactic theory&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|-&lt;br /&gt;
|Political science&lt;br /&gt;
|Discourse on government&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|-&lt;br /&gt;
|Formal Reasoning&lt;br /&gt;
|Formal reasoning&lt;br /&gt;
|-&lt;br /&gt;
|Welfare Theory&lt;br /&gt;
|Discourse on social welfare&lt;br /&gt;
|-&lt;br /&gt;
|Theory of Events&lt;br /&gt;
|Discourse on the nature of events&lt;br /&gt;
|-&lt;br /&gt;
|Medical ethics&lt;br /&gt;
|Discourse on medical ethics&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221808</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221808"/>
		<updated>2015-12-04T04:57:52Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Moved &amp;quot;Objects and Properties&amp;quot; to philosophy; added several topics to philosophy&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|-&lt;br /&gt;
|Theory of justification&lt;br /&gt;
|Discourse on the nature of justification&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|-&lt;br /&gt;
|Horology&lt;br /&gt;
|Discourse on the nature of time&lt;br /&gt;
|-&lt;br /&gt;
|Philosophy of Mind&lt;br /&gt;
|Discourse on the nature of mind and body&lt;br /&gt;
|-&lt;br /&gt;
|Martial Ethics&lt;br /&gt;
|Discourse on ethics as applied to war&lt;br /&gt;
|-&lt;br /&gt;
|Aesthetics&lt;br /&gt;
|Discourse on the nature of beauty&lt;br /&gt;
|-&lt;br /&gt;
|Jurisprudence&lt;br /&gt;
|Discourse on law&lt;br /&gt;
|-&lt;br /&gt;
|Syntactic theory&lt;br /&gt;
|Discourse on grammar&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221807</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221807"/>
		<updated>2015-12-04T04:40:14Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Moved ores to chemistry, added several chemistry topics&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials&lt;br /&gt;
|-&lt;br /&gt;
|Mineral taxonomy&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|Evaporation&lt;br /&gt;
|The theory and method of evaporation&lt;br /&gt;
|-&lt;br /&gt;
|Material taxonomy&lt;br /&gt;
|The classification of materials based on which elemental materials might form them&lt;br /&gt;
|-&lt;br /&gt;
|Laboratory Science&lt;br /&gt;
|Methods for performing experiments systematically in the laboratory&lt;br /&gt;
|-&lt;br /&gt;
|Ampoule&lt;br /&gt;
|The construction and use of the ampoule&lt;br /&gt;
|-&lt;br /&gt;
|Alembic&lt;br /&gt;
|The construction and use of the alembic&lt;br /&gt;
|-&lt;br /&gt;
|Alloys&lt;br /&gt;
|The mixture of metals to produce alloys&lt;br /&gt;
|-&lt;br /&gt;
|Solvent Extraction&lt;br /&gt;
|The theory and methods involved in the extraction of a constituent liquid from one solution to another&lt;br /&gt;
|-&lt;br /&gt;
|Blast Furnace&lt;br /&gt;
|The construction and use of the blast furnace&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221806</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221806"/>
		<updated>2015-12-04T04:23:43Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added chemistry list; moved adhesives to chemistry&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|The preparation and use of adhesive materials.&lt;br /&gt;
|}&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Ores&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221805</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221805"/>
		<updated>2015-12-04T04:17:04Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added a few philosophy topics&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Ores&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|-&lt;br /&gt;
|Diplomatic discourse&lt;br /&gt;
|Discourse on diplomacy&lt;br /&gt;
|-&lt;br /&gt;
|Discourse on Contentment&lt;br /&gt;
|Discourse on the meaning of individual happiness&lt;br /&gt;
|-&lt;br /&gt;
|Economic discourse&lt;br /&gt;
|Discourse on economic policy&lt;br /&gt;
|-&lt;br /&gt;
|Civic ethics&lt;br /&gt;
|Discourse on ethics as it regards the benefit of the state&lt;br /&gt;
|-&lt;br /&gt;
|Phenomenology&lt;br /&gt;
|Discourse on the nature of perception&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221804</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221804"/>
		<updated>2015-12-04T04:07:37Z</updated>

		<summary type="html">&lt;p&gt;Figwat: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|-&lt;br /&gt;
|The Crystal Lens&lt;br /&gt;
|The construction and use of the crystal lens&lt;br /&gt;
|-&lt;br /&gt;
|The Funnel&lt;br /&gt;
|The construction and use of the funnel&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causation&lt;br /&gt;
|The causes of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|-&lt;br /&gt;
|Very Large Numbers&lt;br /&gt;
|Notation for very large numbers&lt;br /&gt;
|-&lt;br /&gt;
|Nothingness&lt;br /&gt;
|A symbol for nothingness&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|-&lt;br /&gt;
|Disease and Foul Water&lt;br /&gt;
|The connection between disease and fouled water&lt;br /&gt;
|-&lt;br /&gt;
|Herbal Remedies&lt;br /&gt;
|Herbal remedies&lt;br /&gt;
|-&lt;br /&gt;
|Physical Examination&lt;br /&gt;
|The method of physical examination in diagnosing illness&lt;br /&gt;
|-&lt;br /&gt;
|Probing&lt;br /&gt;
|The surgical method of probin&lt;br /&gt;
|-&lt;br /&gt;
|Prognosis&lt;br /&gt;
|Determining the likely outcome given a patient's current status&lt;br /&gt;
|-&lt;br /&gt;
|Progressive Pathology&lt;br /&gt;
|The notion of the exacerbation of a patient's condition&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Ores&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|-&lt;br /&gt;
|Interpersonal Ethics&lt;br /&gt;
|Ethics as applied to interpersonal conduct&lt;br /&gt;
|-&lt;br /&gt;
|Causation&lt;br /&gt;
|The nature of causation&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Knowledge&amp;diff=221803</id>
		<title>Knowledge</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Knowledge&amp;diff=221803"/>
		<updated>2015-12-04T03:59:19Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Grammar&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Tattered|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Knowledge''' is a feature in ''Dwarf Fortress''.&lt;br /&gt;
&lt;br /&gt;
The nine branches of knowledge are: mathematics, philosophy, history, geography, medical science, natural science, astronomy, engineering, and chemistry.&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221704</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221704"/>
		<updated>2015-12-03T17:49:40Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added some medical science topics&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|-&lt;br /&gt;
|Paroxysm&lt;br /&gt;
|The notion of paroxysm&lt;br /&gt;
|-&lt;br /&gt;
|Fracture Treatment&lt;br /&gt;
|The treatment of fractures&lt;br /&gt;
|-&lt;br /&gt;
|Scraping&lt;br /&gt;
|The surgical method of scraping&lt;br /&gt;
|-&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|Anesthesia&lt;br /&gt;
|-&lt;br /&gt;
|Practice models&lt;br /&gt;
|The use of practice models in surgery&lt;br /&gt;
|-&lt;br /&gt;
|Surgical Instruments&lt;br /&gt;
|The use of specialized surgical instruments&lt;br /&gt;
|-&lt;br /&gt;
|Anatomy&lt;br /&gt;
|Anatomical studies for medical edification&lt;br /&gt;
|-&lt;br /&gt;
|Ocular Anatomy&lt;br /&gt;
|The anatomy of the eye&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Ores&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221703</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221703"/>
		<updated>2015-12-03T17:37:25Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added a few topics to history&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Comparison&lt;br /&gt;
|Compiling several biographies to compare and contrast the subjects' character and to gain insight into history&lt;br /&gt;
|-&lt;br /&gt;
|Alternate History&lt;br /&gt;
|The exploration of how history would be different if some key past events had transpired differently the notion of historical, governmental and social cycles&lt;br /&gt;
|-&lt;br /&gt;
|Cyclic History&lt;br /&gt;
|The notion of historical, governmental and social cycles&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Ores&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221702</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221702"/>
		<updated>2015-12-03T17:31:31Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added several topics to history section&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|-&lt;br /&gt;
|Biography&lt;br /&gt;
|The method of writing the history of a single individual&lt;br /&gt;
|-&lt;br /&gt;
|Cultural Comparison&lt;br /&gt;
|The method of comparing and contrasting different cultures&lt;br /&gt;
|-&lt;br /&gt;
| &lt;br /&gt;
|The role of cultural differences in source reliability and interpretation&lt;br /&gt;
|-&lt;br /&gt;
|Biographical Anthology&lt;br /&gt;
|The compilation of brief biographies into one large collection&lt;br /&gt;
|-&lt;br /&gt;
|Genealogy&lt;br /&gt;
|The compilation of family lineages and methods of displaying them artfully&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Ores&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
	<entry>
		<id>https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221700</id>
		<title>Topic</title>
		<link rel="alternate" type="text/html" href="https://dwarffortresswiki.org/index.php?title=Topic&amp;diff=221700"/>
		<updated>2015-12-03T17:09:13Z</updated>

		<summary type="html">&lt;p&gt;Figwat: Added a topic to history section&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Quality|Superior|06:10, 17 May 2015 (UTC)}}&lt;br /&gt;
{{av}}&lt;br /&gt;
&lt;br /&gt;
{{new in v0.42}}&lt;br /&gt;
&lt;br /&gt;
'''Topics''' (also '''Tech''' or '''Innovations''') are part of [[knowledge]].&lt;br /&gt;
&lt;br /&gt;
There are around 300 innovations that can be discovered. Many of them have requirements, and many do not, so it's kind of a tech forest/grassland rather than a tree. Notably missing are innovations related to practical labors in the game (which will be added later in development).&lt;br /&gt;
&lt;br /&gt;
Several innovations require innovations from other branches, and since all knowledge is individually tracked, that implies some investigators will need to be at least well-read if not skilled in various topics (there aren't currently joint research projects). There are some old and new mechanisms in place to ensure this happens.&lt;br /&gt;
&lt;br /&gt;
There are 9 &amp;quot;branches&amp;quot; of the knowledge system.&lt;br /&gt;
==Astronomy==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the sun moves around the world&lt;br /&gt;
|-&lt;br /&gt;
|Daylight And Seasons&lt;br /&gt;
|The variation of daylight with the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the lunar and solar year&lt;br /&gt;
|-&lt;br /&gt;
|The Sun and Seasons&lt;br /&gt;
|The rise of the sun according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The path of the moon&lt;br /&gt;
|-&lt;br /&gt;
|The Moon and Seasons&lt;br /&gt;
|The rise of the moon according to the season&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The relationship between the moon and the tides&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The creation of star charts&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The theory that the world moves around the sun&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Methods of empirical observation in astronomy&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Chemistry ==&lt;br /&gt;
* [[wikipedia:Sulfuric acid|Oil of vitriol]]&lt;br /&gt;
* [[wikipedia:Nitric acid|Spirit of niter]]&lt;br /&gt;
&lt;br /&gt;
== Engineering ==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|The Pulley&lt;br /&gt;
|The construction and use of the pulley&lt;br /&gt;
|-&lt;br /&gt;
|The Lever&lt;br /&gt;
|The construction and use of the lever&lt;br /&gt;
|-&lt;br /&gt;
|The Windlass&lt;br /&gt;
|The construction and use of the windlass&lt;br /&gt;
|-&lt;br /&gt;
|The Screw&lt;br /&gt;
|The construction and use of the screw&lt;br /&gt;
|-&lt;br /&gt;
|Models and Templates&lt;br /&gt;
|The use of models and templates in engineering&lt;br /&gt;
|-&lt;br /&gt;
|The Warded Lock&lt;br /&gt;
|The construction and use of the warded lock&lt;br /&gt;
|-&lt;br /&gt;
|The Tumbler Lock&lt;br /&gt;
|The construction and use of the tumbler lock&lt;br /&gt;
|-&lt;br /&gt;
|The Siphon&lt;br /&gt;
|The action of the siphon&lt;br /&gt;
|-&lt;br /&gt;
|Gears&lt;br /&gt;
|The reasons why gears are effective&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[wikipedia:Differential (mechanical device)|Differential gears]] are a difficult innovation and a prerequisite for [[wikipedia:South-pointing chariot|pointing chariot]]s and [[wikipedia:Astrarium|astrarium]]s.&lt;br /&gt;
&lt;br /&gt;
== Geography ==&lt;br /&gt;
The geography innovations include several related to [[wikipedia:cartography|cartography]].&lt;br /&gt;
&lt;br /&gt;
== History ==&lt;br /&gt;
Innovations for historians are, in part, writing forms like [[wikipedia:biography|biography]], and then any historian that reads a biography can start writing them as well. Innovations include comparative biographies describing multiple people, and matters of sourcing, etc.&lt;br /&gt;
&lt;br /&gt;
Historians can start to understand how cultural differences and state bias affects source reliability and think a bit about social forces.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Archaeology&lt;br /&gt;
|The method of collecting and evaluating artifacts to learn about history and culture&lt;br /&gt;
|-&lt;br /&gt;
|Cultural History&lt;br /&gt;
|The method of accurately and comprehensively describing cultures and civilizations&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Source Reliability&lt;br /&gt;
|The reliability of sources&lt;br /&gt;
|-&lt;br /&gt;
|Personal Interviews&lt;br /&gt;
|Using personal interviews as sources&lt;br /&gt;
|-&lt;br /&gt;
|Autobiographical Adventures&lt;br /&gt;
|The method of writing a biography of oneself, particularly as it concerns a military campaign or adventure&lt;br /&gt;
|-&lt;br /&gt;
|Historical Causes&lt;br /&gt;
|Discourse on the cause of historical events&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Mathematics ==&lt;br /&gt;
* [[wikipedia:Harmonic series (mathematics)#Divergence|Divergence of harmonic series]]&lt;br /&gt;
* [[wikipedia:Plus and minus signs#Plus sign|Symbol for addition]]&lt;br /&gt;
* [[wikipedia:Proof by contradiction|Proof by contradiction]]&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Positional Notation&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Large Sums&lt;br /&gt;
|Simple formulas for certain arbitrarily large sums&lt;br /&gt;
|-&lt;br /&gt;
|Equations&lt;br /&gt;
|The technique of balancing and completion for solving equations&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Medical science ==&lt;br /&gt;
Medical innovations include dedicated hospitals with specialized wards, staffing, medical labs and treatment for many illnesses.&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Diseases&lt;br /&gt;
|The diseases of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Mineral Remedies&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Medical Ethics&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Disease Classification&lt;br /&gt;
|The classification of disease&lt;br /&gt;
|-&lt;br /&gt;
|Toxicology&lt;br /&gt;
|The classification of toxic substances&lt;br /&gt;
|-&lt;br /&gt;
|Suturing&lt;br /&gt;
|The surgical method of suturing&lt;br /&gt;
|-&lt;br /&gt;
|Traumatic Injuries&lt;br /&gt;
|The treatment of traumatic injuries&lt;br /&gt;
|-&lt;br /&gt;
|Draining&lt;br /&gt;
|The surgical method of draining&lt;br /&gt;
|-&lt;br /&gt;
|Bandages&lt;br /&gt;
|The method of bandaging wounds&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Natural science ==&lt;br /&gt;
Toady on natural science innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;And so on through the other seven branches - there are innovations in naturalist writings, for example, and then they can investigate specific critters with those in mind when they get down to work observing foraging behavior or performing dissections.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Naturalists can build a theory of [[wikipedia:rainbow|rainbow]]s using water-filled spheres and a [[wikipedia:camera obscura|camera obscura]], and they can calculate the height of the atmosphere based on [[wikipedia:atmospheric refraction|atmospheric refraction]] using the [[wikipedia:law of refraction|law of refraction]] (though it tries not to get into the actual shape of the world, since that might vary).&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Wind Patterns&lt;br /&gt;
|The forces that govern wind patterns&lt;br /&gt;
|-&lt;br /&gt;
|Physical Features&lt;br /&gt;
|The classification of creatures by their physical features&lt;br /&gt;
|-&lt;br /&gt;
|Climactic Adaptation&lt;br /&gt;
|The way that creatures are suited to the climates in which they live&lt;br /&gt;
|-&lt;br /&gt;
|Migratory Patterns&lt;br /&gt;
|The migratory patterns of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Ores&lt;br /&gt;
|The classification of ores&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The origin of rainfall through evaporation and condensation&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|A world-wide cycle involving precipitation, oceans, rivers and other forms of water&lt;br /&gt;
|-&lt;br /&gt;
|Water Displacement&lt;br /&gt;
|A precise description of buoyancy and water displacement&lt;br /&gt;
|-&lt;br /&gt;
|Foraging Behavior&lt;br /&gt;
|The foraging behavior and diet of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Reproductive Behavior&lt;br /&gt;
|The reproductive behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Social Behavior&lt;br /&gt;
|The social behavior of creatures&lt;br /&gt;
|-&lt;br /&gt;
|Dissection&lt;br /&gt;
|The dissection of creatures&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Philosophy ==&lt;br /&gt;
The specific view that a philosopher takes on, say, the nature of beauty or methods of education will depend on their individual/cultural values, where they apply, and a philosopher that encounters a philosophy book on beauty can then provide their own take (having acquired the innovation). &lt;br /&gt;
&lt;br /&gt;
Toady on philosophy innovations:&lt;br /&gt;
&amp;lt;blockquote&amp;gt;For fields like philosophy, I've tried not to make judgments about which ideas are &amp;quot;right&amp;quot; or anything like that, but rather which subjects can be thought about at all.&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Art&lt;br /&gt;
|The value of art&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The worthlessness of peace&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The value of knowledge&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|The nature of truth&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Unknown/unsorted==&lt;br /&gt;
{| class = &amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Topic&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|Economic policy, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Dictionaries&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Adhesives&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|Shadow Clocks&lt;br /&gt;
|The use of shadows to tell direction and time&lt;br /&gt;
|-&lt;br /&gt;
|Social Welfare&lt;br /&gt;
|Social welfare, its forms and recommendations&lt;br /&gt;
|-&lt;br /&gt;
|Objects and Properties&lt;br /&gt;
|The relationship between objects and their properties&lt;br /&gt;
|}&lt;/div&gt;</summary>
		<author><name>Figwat</name></author>
	</entry>
</feed>