Syllogistic fallacy - Definition and Overview

Syllogistic fallacies are logical fallacies that occur in syllogisms. They include:

Any syllogism type (other than polysyllogism and disjunctive):

• fallacy of four terms

Occurring in categorical syllogisms:

• affirmative conclusion from a negative premise
• existential fallacy
• fallacy of exclusive premises
• fallacy of the undistributed middle
• illicit major
• illicit minor

Occurring in disjunctive syllogisms:

• affirming a disjunct

Occurring in statistical syllogisms (dicto simpliciter fallacies):

• accident
• converse accident

External links

• Fallacy files: Syllogistic fallacy (http://www.fallacyfiles.org/syllfall.html)
• Stephen's guide: Syllogistic fallacies (http://www.datanation.com/fallacies/syllog.htm)