Which fallacy occurs when the premises are negative, but the conclusion is affirmative?

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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

Which fallacy occurs when the premises are negative, but the conclusion is affirmative?

Explanation:
In this fallacy, a negative premise is used to support an affirmative conclusion. Negative premises don’t establish a positive link between terms, so trying to infer something affirmative about the subject from them is invalid. For example, if you have two negative statements like No S are P and No P are Q, concluding that All S are Q (an affirmative claim) oversteps what the premises actually support. The lack of S being P and the lack of P being Q doesn’t force S to be a subset of Q, so the affirmative conclusion isn’t warranted. So the best characterization is drawing an affirmative conclusion from a negative premise.

In this fallacy, a negative premise is used to support an affirmative conclusion. Negative premises don’t establish a positive link between terms, so trying to infer something affirmative about the subject from them is invalid.

For example, if you have two negative statements like No S are P and No P are Q, concluding that All S are Q (an affirmative claim) oversteps what the premises actually support. The lack of S being P and the lack of P being Q doesn’t force S to be a subset of Q, so the affirmative conclusion isn’t warranted.

So the best characterization is drawing an affirmative conclusion from a negative premise.

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