gmat逻辑题求助

rhea79

求助各位大神帮忙，感激不尽！                这道题正确答案是E,为什么A不对呢？  
If we are doomed to have local drug rehabilitation centers-and society has determined that we are-then society ought to pay for them. Which of the following, if true, would weaken the above argument?

• (A)Drug rehabilitation centers are too expensive to be locally funded.
• (B)Many neighborhood groups oppose rehabilitation centers.
• (C)Drug rehabilitation centers are expensive to maintain.
• (D)Drug addicts may be unwilling to receive treatment.
• (E)A government committee has convinced many groups that local rehabilitation centers are ineffective.
  

alzn2765

我觉得这题是一道assumption的变种题，考察的是假设的取否。

前提（因）：如果社会决定我们注定要有戒毒康复中心
结论（果）：社会应该要为这些戒毒康复中心埋单

注意此处为这些戒毒康复中心埋单是“表征”，我们不是为了“挂羊头卖狗肉”的戒毒康复中心付款（这些戒毒康复中心实际是KTV，社会还会埋单吗？），而是为了其可以起到戒毒作用的核心功能而付款。
前提成立需要一个条件：前提有效，也就是戒毒康复中心必须能达到戒毒的作用。
E中A government committee has convinced many groups that local rehabilitation centers are ineffective正是质疑了戒毒康复中心的“有效性”。

rhea79

alzn2765 发表于 2015-8-16 11:09
我觉得这题是一道assumption的变种题，考察的是假设的取否。

前提（因）：如果社会决定我们注定要有戒毒康 ...

懂啦，谢谢！