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Unformatted text preview: Valid Argument Fred is Tall Fred= Joey Joey is Tall Natural Deduction Intro N=N Elimination P(n) N=M P(m) Doesn’t work if the first statement speaks about the second part of the = statement First you must prove that M= N… P(m) N=M N=N : Identity Introduction M=N: Identity Elimination P(N)...
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This note was uploaded on 04/10/2008 for the course PHIL 155 taught by Professor Hofweber during the Spring '08 term at UNC.
 Spring '08
 Hofweber
 Philosophy

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