论文部分内容阅读
新编全日制十年制初中数学教材(以下简称教材)结合数学知识对定义、命题等有关逻辑基础知识作了简单的通俗的介绍,这对培养和发展学生的逻辑思维能力是十分必要的。本文将密切联系教材内容,对逆命题及其制作的有关问题做较详细的说明。一、命题的结构在形式逻辑中,把对事物有所肯定或否定的思维形态叫做判断。判断的语言表达形式是句子。教材中通俗地把命题定义为“判断一件事情的句子”。例如“含有未知数的等式叫做方程”,“两点决定一条直线”,“如果两条直线都和第三条直线垂直,那么这两
The newly-edited full-time 10-year junior high school mathematics textbook (hereinafter referred to as the teaching material) combines mathematical knowledge with basic knowledge of definitions, propositions, and other related logic. This is necessary for cultivating and developing students’ logical thinking ability. This article will be closely linked with the content of the teaching materials and will give a more detailed explanation of the issues related to the contradictions and their production. First, the structure of the proposition In the formal logic, the mode of thinking that affirms or negates something is called judgment. The language expression of the judgment is a sentence. In the textbook, the proposition is defined as “a sentence that judges one thing.” For example, “an equation with an unknown number is called an equation”, “two points determine a straight line,” and "if two straight lines are perpendicular to the third straight line, then these two