square of opposition

English - English

Definition of square of opposition in English English dictionary

Geometrical representation of the traditional logical relations of opposition (contradictories, contraries, subalterns) among the four types of propositions (universal affirmative or A-proposition, universal negative or E, particular affirmative or I, particular negative or O) in the Aristotelian doctrine of the syllogism. At the top left is the A; at the top right is the E; below the A is the I; and below the E is the O. The A and the O, like the E and I, are contradictories (diagonal relations); the A and the E are contraries; and the I is subaltern to (hence implied by) the A, the O subaltern to the E. Whereas contradictories have opposite truth-values (one true, the other false), contraries cannot both be true but can both be false

Hyphenation

square of op·po·si·tion

Turkish pronunciation

skwer ıv äpızîşın

Pronunciation

/ˈskwer əv ˌäpəˈzəsʜən/ /ˈskwɛr əv ˌɑːpəˈzɪʃən/