Question: 3. Using a truth table, show that pA(GVr) (PA) V (PAr) 4. Using a sequence of substitutioas, show that (png)-(p v q) is a tautology

3. Using a truth table, show that pA(GVr) (PA) V (PAr)

3. Using a truth table, show that pA(GVr) (PA) V (PAr) 4. Using a sequence of substitutioas, show that (png)-(p v q) is a tautology

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