In traditional syllogistic, which pair are subcontraries?

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Prepare for the Traditional Logic Memoria Press Test. Optimize your learning with flashcards and in-depth explanations to boost your exam readiness.

Multiple Choice

In traditional syllogistic, which pair are subcontraries?

Explanation:
Subcontraries are the two propositions that cannot both be false, while they can both be true. In traditional syllogistic, this pair is the particular affirmative and the particular negative: Some S are P and Some S are not P. These two share the same terms but are not universal, and they can both hold if there’s at least some S related to P, yet they cannot both be false. The universal pair (All S are P and No S are P) are contraries, not subcontraries, because they cannot both be true but can both be false. The mixes of universal and particular don’t form subcontraries either.

Subcontraries are the two propositions that cannot both be false, while they can both be true. In traditional syllogistic, this pair is the particular affirmative and the particular negative: Some S are P and Some S are not P. These two share the same terms but are not universal, and they can both hold if there’s at least some S related to P, yet they cannot both be false.

The universal pair (All S are P and No S are P) are contraries, not subcontraries, because they cannot both be true but can both be false. The mixes of universal and particular don’t form subcontraries either.

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