For each of the following arguments, a formal proof of validity can be constructed without great difficulty,

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For each of the following arguments, a formal proof of validity can be constructed without great difficulty, although some of the proofs may require a sequence of eight or nine statements (including premises) for their completion.


(P1): A ⊃ B
(P2): C ⊃ D
(P3): A ⊃ C
∴ (A ⋅ B) ꓦ (C ⋅ D)

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Introduction To Logic

ISBN: 9781138500860

15th Edition

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

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