是不是可以这么理解:
 
 
 
 
 因为相信有些食物是导致头痛的根源,所以停止这些食物,但是停止后并没有消除头痛现象,所以一定有别的原因. 
 
 削弱: 根本没有哪些食物导致头痛的有力证据.因为普通食物都可能引起头痛,并在几天后发作,无法判断到底是什么食物引起了头痛. 
 
 
 看一下OG-78. A group of children of various ages was read stories in which people caused harm, some of those people doing so intentionally, and some accidentally. When asked about appropriate punishments for those who had caused harm, the younger children, unlike the older ones, assigned punishments that did not vary according to whether the harm was done intentionally or accidentally. Younger children, then, do not regard people’s intentions as relevant to punishment. 
 
   
 
 Which of the following, if true, would most seriously weaken the conclusion above? 
 
 (A) In interpreting these stories, the listeners had to draw on a relatively mature sense of human psychology in order to tell whether harm was produced intentionally or accidentally. 
 
 OG-78题,小孩知道故意与非故意,小孩只是不用这个条件作为惩罚的尺度. 
   削弱, 小孩根本不能分辨故意与非故意,所以是否用这个条件来作为惩罚尺度根本不适用.
 
 
 这些题是否都是前提削弱呢?
  
 
 
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