EXAMPLE 3 PropOSItIonal Equvalence 命题演 Show that the propositions p-q and -pvgare logically equivalent. Solution: We construct the truth table for these propositions in Table 3. Since the truth values of mpVq and pq agree, these propositions are logically equivalent 2/24/202111:14PM Deren Chen Zhejiang univPropositional Equivalences 命题演算 2/24/2021 11:14 PM Deren Chen, Zhejiang Univ. 9 EXAMPLE 3 Show that the propositions p→q and p∨q are logically equivalent. Solution: We construct the truth table for these propositions in Table 3. Since the truth values of p∨q and p→q agree, these propositions are logically equivalent.  