Library

• All
• Ambiguity
• Formal
• Presumption
• Relevance
• Weak induction

• Affirming the ConsequentFrom “if P then Q” and Q, wrongly concluding that P must be true.
• Denying the AntecedentFrom “if P then Q” and not-P, wrongly concluding that not-Q.
• Undistributed MiddleConcluding two things are the same just because they share a common property.