Syllogistic Fallacies


Treo Compatable Fallacies list

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