Use indirect proof to prove that the following statements are tautologies. (Q R) [(P

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Use indirect proof to prove that the following statements are tautologies.


(Q ⊃ R) ⊃ [(P ⊃ Q) ⊃ (P ⊃ R)]32

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Introduction To Logic

ISBN: 9781138500860

15th Edition

Authors: Irving M. Copi, Carl Cohen, Victor Rodych

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