谈假言命题的几个问题——与《普通逻辑》教材商榷

《普通逻辑》教材对三种不同条件假言命题的定义有“同语反复”的违规之嫌 ;对三种不同条件的定义有不妥之处 ;对充分必要条件的举例有明显错误 ;对充分必要条件假言命题的汉语表达方式类型的陈述存有遗漏。对此 ,本文一一指出并提出了改进和弥补的商榷意见

On Several Problems Concerning if-then Proposition in the Textbook General Logic

There exist some problems concerning the if-then proposition in the textbook General Logic, including the tautology in defining the if-then propositions under three different conditions, the improper definitions of the three conditions, obvious mistakes in the examples of essential and necessary conditions, some omission in the statement of the types of expressing mode in Chinese of if-then proposition on essential and necessary condition. This paper makes a clear demonstration of these problems and suggests some amelioration and reparation to them.