Question: 1. Two sentences in propositional calculus can be shown to be equivalent by proving that one entails the other and vice versa. a. Prove by

1. Two sentences in propositional calculus can be shown to be

1. Two sentences in propositional calculus can be shown to be equivalent by proving that one entails the other and vice versa. a. Prove by contradiction using resolution b. Prove by contradiction using resolution show that ? (PA Q)- P V-Q by doing the following steps

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