Tantologies are logical expressions that are always trne. Decide if the following proposi- 4. tion forms are tautologies using a truth table. Make sure your truth table shows all intermediate logical expressions - for example, in showing the truth table for (pV-q) Ap, your table should contain separate columns for p, q,-q, pV-q, as well as the final expression. You should also clearly state your final answer to the question. (a) [(p V q) v (pA) (p 9) (b) [(-pAq) » (pV-) = (pV -p)

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A: P Q P↔Q Q↔P T T T T T F F F F T F F F F T T