直言命题及其推理的主项存在问题

本文运用现代逻辑的方法分析传统逻辑中的直言命题及其推理理论 ,指出该理论存在一个严重缺陷 ,即主项存在问题 ,提出必须在假定直言命题的变项为非空类、非全类的条件下 ,该理论才是完善的

The existential problem of subject in categorical propositions and their arguments

This paper uses modern methods of logic to analyse the traditional theory of categorical propositions and their arguments and points out that the theory has a serious defect, that is, the existential problem of subject. In order to make it up,the paper proposes that it should be supposed that the subject of categorical propositions are not empty class or full class.