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Question: 20 use only primitive rules of inference to construct a...

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(20%) Use only primitive rules of inference to construct a derivation for this argument: AvB; therefore,( A)& (B)). (Hint: Think about what would be the last step you need to derive ~X, and solve backwards.) (20%) Use only primitive rules of inference to construct a derivation for this argument: (A)&B); therefore (AvB). (Hint: The derivation for this is quite similar to the derivation for the previous problem.)

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