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Unformatted text preview: P&A, 1421; the mistakes people frequently make are also displayed. Valid Argument Form Corresponding Mistake 1. Modus Ponens Fallacy affirming the Consequent If p then q If p then q p q Therefore, q Therefore, p 2. Modus Tollens Fallacy of Denying The Antecedent If p then q If p then q If p then q Not q Not p Therefore, not p Not q 3. MPT Conjunctive Fallacy Not (p and q) Not (p and q) Not (p and q) p q Not p Therefore, not q Therefore, Not p Therefore, q 4. MTP Disjunctive Fallacy p or q p or q p or q Not p not q p Therefore, q Therefore, p Not q Conjunction Introduction p q Therefore, p and q (and q and p) Conjunction Elimination P and q Therefore, P (and q) Disjunction Introduction p ( or q) Therefore, p or q Double Negation p Not notp Therefore, not notp Therefore, p Note summary of logical consequences 20....
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This note was uploaded on 04/18/2008 for the course PHL 100 taught by Professor Boyle during the Spring '08 term at University of Toronto Toronto.
 Spring '08
 BOYLE
 Philosophy

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