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Negative conclusion from affirmative premises

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A negative conclusion from affirmative premises (also illicit affirmative) occurs when a categorical syllogism has a negative conclusion, but two affirmative premises.

It is a syllogistical fallacy and a formal fallacy.

Forms[edit]

You commit this fallacy if you use either of the following false syllogisms:


P1: Some A are B.
P2: Some B are C.
C1: Some A are not C


P1: Some A are B.
P2: Some B are C.
C1: No A are C.

See also[edit]

External links[edit]