Sub-topic: Formal fallacies

• Affirming a disjunct
• Affirming the consequent
• Affirmative conclusion from a negative premise
• Denying the antecedent
• Denying a conjunct
• Negative conclusion from affirmative premises
• Fallacy of exclusive premises
• Fallacies of distribution
  • Illicit process
  • Undistributed middle
• Four-term fallacy
  • Ambiguous middle
• Circular reasoning
• Existential fallacy