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exclusive premises

A syllogism with two negative premises.

The fallacy of exclusive premises occurs when both premises of a categorical syllogism are negative. Two exclusions tell you nothing about how the major and minor terms relate.

Examples

  • "No fish are birds. No birds are reptiles. So no fish are reptiles." The conclusion happens to be true, but the premises don't support it.

See also

rules of the categorical syllogism
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