Table 1 PropOSItIonal Equvalence 命题演算 TABLE 1 Examples of a Tautology and a Contradiction pppV→p|p∧→p T F T T F 2/24/202111:14PM Deren Chen Zhejiang univPropositional Equivalences 命题演算 2/24/2021 11:14 PM Deren Chen, Zhejiang Univ. 5 Table 1