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4. Use substitution and the table of logical equivalences to prove each of the following. Enumerate each step of your proof, and list any logical

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4. Use substitution and the table of logical equivalences to prove each of the following. Enumerate each step of your proof, and list any logical equivalence that you use to justify each step. (a) A(BA)C true. (b) (A(BC))(CA)(BA)C. (c) (A(BA))(C(DC))CD

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