View source for Square of opposition (nonfiction)

[[File:Johannesmagistris-square.jpg|thumb|Square of opposition from book by John Major, published Venice, 15th century.]]The '''square of opposition''' is a diagram representing the relations between four propositions or four concepts.

The origin of the square can be traced back to [[Aristotle (nonfiction)|Aristotle]] making the distinction between two oppositions: contradiction and contrariety, although Aristotle did not draw any diagram.

Early diagrams were drawn several centuries later by Apuleius and Boethius.

== In the News ==

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File:Aristotle.jpg|link=Aristotle (nonfiction)|[[Aristotle (nonfiction)|Aristotle]] dreams he is trapped in a Square of oppotion.
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== Fiction cross-reference ==

== Nonfiction cross-reference ==

* [[Aristotle (nonfiction)]]
* [[Fortress of Solitude (nonfiction)]]
* [[Mathematical diagram (nonfiction)]]

External links

* [https://en.wikipedia.org/wiki/Square_of_opposition Square of opposition] @ Wikipedia

[[Category:Nonfiction (nonfiction)]]
[[Category:Logic (nonfiction)]]