====== Formal fallacies ======

“Formal” fallacies are errors in the //form// of a logical inference.

===== Other names =====

  * <i :la>Non sequitur</i> (“it does not follow”)

===== In this section: =====
== Propositional logic ==

  * [[logic:formal_fallacies:affirming_a_disjunct|Affirming a disjunct]]
  * [[logic:formal_fallacies:affirming_the_consequent|Affirming the consequent]]
  * [[logic:formal_fallacies:denying_a_conjunct|Denying a conjunct]]
  * [[logic:formal_fallacies:denying_the_antecedent|Denying the antecedent]]

== Syllogistic fallacies ==

  * [[logic:formal_fallacies:affirmative_conclusion_from_negative_premise|Affirmative conclusion from a negative premise]]
  * [[logic:formal_fallacies:negative_conclusion_from_affirmative_premises|Negative conclusion from affirmative premises]]
  * [[logic:formal_fallacies:exclusive_premises|Fallacy of exclusive premises ]]
  * [[logic:formal_fallacies:fallacies_of_distribution:index|Fallacies of distribution]]
    * [[logic:formal_fallacies:fallacies_of_distribution:illicit_process|Illicit process]] (undistributed minor/major)
    * [[logic:formal_fallacies:fallacies_of_distribution:undistributed_middle|Undistributed middle]]
  * [[logic:formal_fallacies:four-term_fallacy:index|Four-term fallacy]]
    * [[logic:formal_fallacies:four-term_fallacy:ambiguous_middle|Ambiguous middle (term)]]

== Other formal fallacies ==

  * [[logic:formal_fallacies:circular_reasoning|Circular reasoning]]
  * [[logic:formal_fallacies:existential|Existential fallacy]]