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Square of Opposition
Kristina Willmon
West Coast University
Phil 341
Dr.Arnold
March 6, 2020
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Square of Opposition
The theory of Aristotelian or traditional logic is also known as categorical logic
developed by Aristotle, which analyzes deductive arguments to a logical statement. Deductive
arguments explain that if a premise is true, then the conclusion must be true. Categorical logic
helps test statement or claim for validity by “teach[ing] us to become more careful and precise in
our own thinking” (Moore & Parker, 2017, p. 245). To test the logic of a claim we use the Square
of Opposition which determines the logical relations between each. Each statement must be
written in standard-form claims in order to use the square of opposition.
There are rules to the standard form claims, such that “only nouns and noun phrases will
work,” in the subject and predicate, and must be a deductive argument (Moore & Parker, 2017,
p.245). The standard form claim has four parts to make a logically sentence. A sentence must
