经验告诉我,学生初学《复合判断》,似乎明白了,然而碰到某些练习题,问题又来了,最突出的是常常颠倒假言判断的两种条件关系。如果你让他再翻翻书上关于两种关系的定义,有的会用定义为自己的错误认识辩解,有的则会轻率地结论:教材前后矛盾,一定是编者给搞错了!——这就形成了教学上的“夹生饭”。这里,给了我们两点启示: Experience tells me that students beginner’s “compound judgment” seems to understand, but encountered some exercises, the problem came again, the most prominent is often reversed the hypothesis to judge the two conditions. If you ask him to turn the book about the definition of the two relations, some will use the definition of their own errors to understand and excuse others will recklessly conclude: teaching inconsistencies must be the editor made a mistake! This formed a teaching “cooked rice.” Here, give us two revelations: