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Two proofs that (A ⇒ B) if and only if (⌐B ⇒ ⌐A) Direct proof We can construct a "truth table" that maps the situation for all possible values of A and B:
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Document Date: 2016-09-18 19:02:01
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Two proofs that (A ⇒ B) if and only if (⌐B ⇒ ⌐A) Direct proof We can construct a "truth table" that maps the situation for all possible values of A and B: