我国先秦时期后期墨家建立了辩学，“故、理、类”是墨家辩学的重要范畴。它们是为谈说论辩服务的，有别于亚里士多德逻辑学理论的三段论的前提，有其独特的内涵。这是先秦文化特点决定的，东西文化的差异，决定着“故、理、类”仅仅是立“辞”的准则、依据，立“辞”是为辩论服务的，辩的作用在于为社会政治服务，在于辩论取胜。 In the late Pre-Qin period of our country, the Mohists established the debate. The “reason, reason and class” is an important category of Mohism’s debate. They are the premise of syllogism, which is different from the Aristotelian logic theory, and have their unique connotations. This is decided by the characteristics of the pre-Qin culture. The differences between Eastern and Western cultures determine that “reason, reason and class” are merely guidelines for establishing “rhetoric.” Service, is to win the debate.