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Unformatted text preview: case that the antecedent is true and the consequent is false (applies to all forms) If P then Q, can use arrow or horseshoe A > B Method 1: o Ask: is the consequent true? o Statement has to be true o If not, determine whether the antecedent is true or false Method 2: o Ask: is the antecedent false? o If so, then the statement is true o If not, then determine the truth value of the consequent P Q P > Q ~(P ~Q) T T T T T F F F F T T T F F T T (A > B) > Z T T F True antecedent, false consequent, FALSE STATEMENT {[(X > Y) > Z] > [Z > (X > Y)]} > [(X > Z) > Y] (F > T) > F T > F F [P > (Q>P)] > Y Experiment w/ true and false values for unknowns Statement is False...
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This note was uploaded on 03/16/2011 for the course PHIL 045 taught by Professor Hopper during the Fall '07 term at GWU.
 Fall '07
 Hopper

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