对当关系直接推理外延的再扩展  

Re-expanding on the Immediate Inference of Equivalent Relation

作　　者：向钘[1] 

机构地区：[1]毕节学院经济与管理系,毕节学院逻辑与应用逻辑研究所,贵州毕节551700

出　　处：《毕节学院学报（综合版）》2008年第5期49-53,共5页Journal of Bijie University

摘　　要：目前,人们对对当关系直接推理的研究,主要是同素材的性质命题、模态命题、规范命题以及复合命题间的对当关系直接推理,而相同素材的性质命题与其负命题间尚未涉及。事实上,根据相同素材的性质命题与其负命题间对当关系也能进行有效的直接推理。At present, the discussion on the immediate inference of equivalent relation is mainly in nature propositions by identical original material, modal propositions, normal propositions and complex propositions. None touched upon nature propositions by identical original material and their negative propositions. In fact, based on the equivalent relation of nature proposition by identical original material and their negative proposition, we can deduce effective immediate inference.

关 键 词：对当关系 直接推理 外延 

分 类 号：B81[哲学宗教—逻辑学]