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The following are syllogistic fallacies:
Fallacy of Four Terms: a syllogism has four terms
Undistributed Middle: two separate categories are said to be connected because they share a common property
Illicit Major: the predicate of the conclusion talks about all of something, but the premises only mention some cases of the term in the predicate
Illicit Minor: the subject of the conclusion talks about all of something, but the premises only mention some cases of the term in the subject
Fallacy of Exclusive Premises: a syllogism has two negative premises
Fallacy of Drawing an Affirmative Conclusion From a Negative Premise: as the name implies
Existential Fallacy: a particular conclusion is drawn from universal premises
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