一 弄清楚什么是集合概念与非集合概念,这是逻辑学教学中的一大难点。由于难度大,往往教者不厌其烦地反复解释,而学者仍然觉得迷迷糊糊,做起练习来错误百出。为什么初学者往往对集合概念望而生畏呢?我觉得这是因为我们目前的大多数逻辑教科书,对于集合概念的定义下得不够确切,阐述得不正确的缘故。 A clear understanding of what is the concept of collection and non-collection of concepts, which is a major difficulty in teaching logic. Due to the difficulty, teachers often take the trouble to repeatedly explain, while scholars still feel drowsiness, to start practicing mistakes. Why beginners tend to be afraid of the concept of a collection? I think this is because most of our current logic textbooks, the definition of the concept of the collection is not precise enough, the reason is incorrect.