请教一道逻辑单题

Louis: People's intentions cannot be, on the whole, more bad than good.Were we to believe otherwise, we would inevitably cease to trust each other, and no society can survive without mutual trust among its members.

The argument is most vulnerable to which one of the following criticisms?

A:It fails to rule out the possibility that a true belief can have deleterious consequences.

B:It mistakenly assumes that if two claims cannot at the same time both be true, then thay cannot at the same time both be false.

C:It challenges the truth of a claim merely by calling into question the motives of those who profess that they it to be true.

D:It assumes without warrant that in any situation with two possible outcomes, the most negative on will inevitably occur.

E:It provides no reason to believe that a statement that is true of a given group of people is also true of any other group of people.

正确答案是A，怎么也想不通，请指教！

本题最好用排除法，BCDE明显题目中没有提到

如果非要分析A为什么正确，我个人的看法如下：

题干的逻辑结构为：       if   intention more bad, then  cease to trust each other  (1)

                         only if trust each other, our society can survive (2)

                         because now our society survives

                          由条件（2）得: we must trust each other，条件（1）右边为假

                          所以条件（1） 左边必为假,即 intention 为 more good

要攻击这个逻辑  就要动摇 （1）（2）两个条件中的一个或全部：

 a true belief can have deleterious consequences

 那就相当于，  if intention more good ， can  bad    与条件（1）冲突

所以，这个相比之下就most attack了

最好还是用排除法，个人感觉最快

谢谢liansha

但是这个命题是第一个命题的否命题，原则上并不能对第一个命题的有效性产生影响的

不过相比之下确实只有这个要好一些

这个题问的是 哪个是  most

这类型的题 有时正确答案也是 非常看着不舒服的

但是 相比之下 也只能选这个了

most != good   

我不认为上面各位的解释是好办法。首先，排除法是没有办法的办法，其次，排除法成功率极低。原因在于，大多数人只有在看不懂题干，或看不懂答案，或看不出毛病的情况下才用---可想而知效果不可能理想。

这算是一道难题，有1/3的人选B(包括我）。

做不出来的原因：理解错误。上面二楼的理解就是典型的理解错误。关键在于最后一句说的是“and no society can survive without mutual trust among its members.”，而不是说" since no society survives without mutual trust among its members."楼上把原提曲解成后一种理解，因为这道题的假设（或者说潜台词）是说 since our society need to (or will) survive (in the future),而不是说 since our society has exsited for so long)

  funny

My god!!