请教一道逻辑题

reddragon

Studies have shown that people who rarely take antibiotics, which are antibacterial
drugs, have stronger immune systems than do people who take antibiotics frequently. Yet there is no evidence that taking antibiotics weakens the immune system.
Question:Which of the following, if true, best reconciles the apparent discrepancy in teh information above?
(A) People who have strong immune systems seldom get the kinds of infectionsfor which people normally take antibiotics.
(B) People who have strong immune systems are seldom aware that their immune systems are unusually strong.
(C) People who have weak immune systems have great difficulty recovering from bacterial infections if they do not take antibiotics.
(D) Some people take antibiotics even though the antibiotics cause a variety of side effects.
(E) Some people take antibiotics frequently because their doctors prescribe antibiotics forviral infections as well as for bacterial infections.

答案选A，但是我选的是C。
题目意思是 1 take antibiotics和immune system之间有关系 2 take antibiotics不会导致weak immune system. 那么显然另一种可能是 weak immune system导致take antibiotics， 所以我选了C。A说strong immune system导致不得病-所以不吃antibiotics 的确也是合理的。 但是C为什么错呢？不解！

DayDreamings

本来我挺明白的 经楼主这么一说 我一琢磨 反而糊涂了 。如果把c选项取反 所得的选项正好削弱原文结论啊 那么就说明c正确了 I'm confused~~~

sunniers

我似乎看出了一点苗头
题目说的是免疫系统好的人比免疫系统差的人药吃的少

A强调的是免疫系统好的人少得病

C说的是免疫系统差的人得病了需要吃药，就是说免疫系统差的人得病了一定要吃药，我觉得C可以看成一个事实。因为C可以建立在整一个argument的前提下。文章就是说免疫系统差的人药吃的多，C只是解释了为什么他们药吃的多，因为难以恢复。那么C就是属于无关项了。
而且我再看我自己先前列出的假设2：吃药多的人本身就免疫差，也就是说他们本身就容易得病，而不是说他们本身就药吃的多。不知道楼主有没有理解我的意思。。。

reddragon

谢谢，可是A只是说免疫系统好的人少得病，按照你的意思，少得病->少吃药这也是一个假设。

daoyinger

Studies have shown that people who rarely take antibiotics, which are antibacterial
drugs, have stronger immune systems than do people who take antibiotics frequently. Yet there is no evidence that taking antibiotics weakens the immune system.
Question:Which of the following, if true, best reconciles the apparent discrepancy in teh information above?
(A) People who have strong immune systems seldom get the kinds of infectionsfor which people normally take antibiotics.      不吃药的抵抗力强是因为 抵抗力强的基本不生病,所以不吃药
(B) People who have strong immune systems are seldom aware that their immune systems are unusually strong.
(C) People who have weak immune systems have great difficulty recovering from bacterial infections if they do not take antibiotics.   这个解释为什么抵抗力差的吃药 但是没有解释为什么不吃药的抵抗力好的  
(D) Some people take antibiotics even though the antibiotics cause a variety of side effects.
(E) Some people take antibiotics frequently because their doctors prescribe antibiotics forviral infections as well as for bacterial infections.

答案选A，但是我选的是C。
题目意思是 1 take antibiotics和immune system之间有关系 2 take antibiotics不会导致weak immune system. 那么显然另一种可能是 weak immune system导致take antibiotics， 所以我选了C。A说strong immune system导致不得病-所以不吃antibiotics 的确也是合理的。 但是C为什么错呢？不解！

sunniers

吃药少的人比吃药多的人免疫系统号不能说吃药造成免疫功能降低。为什么呢？

因为1,吃药烧的人本身就免疫系统好A
   2，吃药多的人本身就免疫系统差

C对于第二种情况我觉得也是合理的，不过相比较而言没有A强，因为C说的是免疫系统差的人不容易恢复如果不吃药的话。如果作为weaken条件还需要加上一个自己的假设：因此，他们就要吃药。而A是直接说免疫系统好的人不吃药。更加直接。。

期待更多讨论