一、话题背景《中小学数学》2009年第5期刊登了张新春老师的《从探究中的逻辑问题谈起》一文,文中针对2008年第11期《探究到底有多深》的作者提出的质疑发表观点:探究不管有多深,一定不能有逻辑上的问题。此文从逻辑的角度否定了文中所提的求证三角形内角和的做 First, the topic background “Primary and secondary mathematics” 2009 the fifth issue of Zhang Xinchun teacher published “from the logic of the question to talk about,” a paper for the 2008 issue of 11 “in the end how deep” the author put forward Questioning the point of view: To explore no matter how deep, there must be no logical problems. This article from a logical point of view to negate the text of the triangle inside the triangle and verify