初学逻辑基础知识的同志,往往对假言判断“前件”与“后件”的关系及其变化规律,觉得不好掌握,弄得不好,便胡涂了。最近,阅读学习了一些逻辑知识的书籍,我领悟到,对于这类问题,如果利用图象来帮助理解,既简明,又形象。下面,想就这方面的问题,谈一点个人的学习体会,就教于专家和读者。 The comrades who are basic knowledge of beginner logic tend to judge the relationship between the “preceding” and the “postpiece” and their changing rules, and feel that it is not easy to grasp. Recently, reading books that have learned some logic knowledge, I realized that for such problems, if images are used to help understanding, they are both concise and vivid. In the following, I would like to talk about personal learning experiences in this aspect and teach them to experts and readers.