syllogistic fallacy
logical fallacies that occur in syllogisms
illicit major
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
converse accident
informal fallacy when a rule that applies only to an exceptional case is wrongly applied to all cases in general
illicit minor
formal fallacy committed in a categorical syllogism that is invalid because its minor term is undistributed in the minor premise but distributed in the conclusion
affirmative conclusion from a negative premise
logical fallacy
existential fallacy
type of formal fallacy
fallacy of the undistributed middle
logical fallacy
negative conclusion from affirmative premises
syllogistic fallacy committed when a categorical syllogism has a negative conclusion yet both premises are affirmative
fallacy of necessity
logical fallacy in the logic of a syllogism whereby a degree of unwarranted necessity is placed in the conclusion
fallacy of four terms
formal fallacy that occurs when a syllogism has four (or more) terms
accident fallacy
informal fallacy
fallacy of exclusive premises
syllogistic fallacy committed in a categorical syllogism that is invalid because both of its premises are negative