This article is rated B-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Mathematics Low‑priority This article is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.MathematicsWikipedia:WikiProject MathematicsTemplate:WikiProject Mathematicsmathematics articles Low This article has been rated as Low-priority on the project's priority scale. Philosophy: Logic High‑importance This article is within the scope of WikiProject Philosophy, a collaborative effort to improve the coverage of content related to philosophy on Wikipedia. If you would like to support the project, please visit the project page, where you can get more details on how you can help, and where you can join the general discussion about philosophy content on Wikipedia.PhilosophyWikipedia:WikiProject PhilosophyTemplate:WikiProject PhilosophyPhilosophy articles High This article has been rated as High-importance on the project's importance scale. Associated task forces: /  Logic

Daily pageviews of this article A graph should have been displayed here but graphs are temporarily disabled. Until they are enabled again, visit the interactive graph at pageviews.wmcloud.org

If notions are not defined, but used, how do computers validate proofs?-- 83.50.70.49 ( talk) 01:13, 2 July 2013 (UTC) reply

As stated in the article, relations between primitive notions are restricted by axioms. The real question is what kind of relations don't constitute a definition, which I feel can be very subtle, and I hope will be explained by someone more familiar with mathematical logic than me. -- Bbbbbbbbba ( talk) 01:56, 26 February 2023 (UTC) reply