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23 Jun 2014, 12:57 pm by Schachtman
ITERATIVE DISJUNCTIVE SYLLOGISM Basic propositional logic teaches that the disjunctive syllogism (modus tollendo ponens) is a valid argument, in which one of its premises is a disjunction (P v Q), and the other premise is the negation of one of the disjuncts: P v Q ~P­­­_____ ∴ Q See Irving Copi & Carl Cohen Introduction to Logic at 362 (2005). [read post]