Each of the following exercises presents a flawless formal proof of validity for the indicated argument. For

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Each of the following exercises presents a flawless formal proof of validity for the indicated argument. For each proof, state the justification for each inferred statement (i.e., each statement that is not a premise).

1. (A ꓦ B) ⊃ C
2. (C ꓦ B) ⊃ [A . (D ≡ E)]
3. A ⋅ D
∴ D ≡ E
4. A
5. A ꓦ B
6. C
7. C ꓦ B
8. A ⊃ (D ≡ C)
9. D ≡ E

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Introduction To Logic

ISBN: 9781138500860

15th Edition

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

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Question Posted: Apr 14, 2023 11:51 PM

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Each of the following exercises presents a flawless formal proof of validity for the indicated argument. For

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Introduction To Logic

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