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How we change what others think, feel, believe and do
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How we change what others think, feel, believe and do |
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Illicit Major
Disciplines > Argument > Fallacies > x Description | Discussion | Example | See also
DescriptionAll X is Y. No P (which is a subset of Y) is X. Therefore no P is Y. Unspoken assumption: All Y is X. ExampleAll Londoners are European. No Parisiens are Londoners. Therefore no Parisiens are European. DiscussionThis is a particular case of a categorical syllogism, where overlaps of sets are taken to be different in each statement. Thus the fallacy in the example occurs when the first statement is assumed to be reversible (that if all Londoners are European, then all Europeans are Londoners). More formally, the predicate (Y) of the conclusion (no P is Y) refers to all members of that set. Yet the same term (Y) in the major premise (All X is Y) refers only to some of the members (X) of that set. The 'Major' in the name is the major premise, the first statement in the syllogism.
ClassificationSee also |
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