Syllogistic fallacies

Illicit major

Illicit major is a formal fallacy committed in a categorical syllogism that is invalid because its major term is undistributed in the major premise but distributed in the conclusion. This fallacy has the following argument form: 1. * All A are B 2. * No C are A 3. * Therefore, no C are B Example: 1. * All dogs are mammals 2. * No cats are dogs 3. * Therefore, no cats are mammals In this argument, the major term is "mammals". This is distributed in the conclusion (the last statement) because we are making a claim about a property of all mammals: that they are not cats. However, it is not distributed in the major premise (the first statement) where we are only talking about a property of some mammals: Only some mammals are dogs. The error is in assuming that the converse of the first statement (that all mammals are dogs) is also true. However, an argument in the following form differs from the above, and is valid (Camestres): 1. * All A are B 2. * No B are C 3. * Therefore, no C are A (Wikipedia).

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From playlist Biochemistry

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From playlist Miscellaneous

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From playlist Random

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呼叫魚

好恐佈,咁都食得落口

From playlist Crazy Stuff

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From playlist Culture in Crisis

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From playlist Science for Common Folk

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From playlist The JOEY SHANKS archives

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From playlist Culture in Crisis II

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From playlist American Contract Law

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From playlist Fake Videos!

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From playlist Culture in Crisis II

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From playlist Center for Applied Cybersecurity Research (CACR)

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From playlist Culture in Crisis

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From playlist Social & Political Philosophy

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From playlist Council on East Asian Studies (CEAS)

Related pages

Formal fallacy | Illicit minor | Validity (logic)