Prove the invalidity of the following, in each case using the suggested notation: Some physicians are quacks.

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Prove the invalidity of the following, in each case using the suggested notation:


Some physicians are quacks. Some quacks are not responsible. Therefore some physicians are not responsible. (Px, Qx, Rx)

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Introduction To Logic

ISBN: 9781138500860

15th Edition

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

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