Compare OG-67 with OG11-10

wnlovess

67. A greater number of newspapers are sold in Town S than in Town T.
Therefore, the citizens of Town S are better informed about major world events than are the citizens of Town T.

Each of the following, if true, weakens the conclusion above EXCEPT:

(A) Town S has a larger population than Town T.
(B) Most citizens of Town T work in Town S and buy their newspapers there.
(C) The average citizen of Town S spends less time reading newspapers than does the average citizen of Town T.
(D) A weekly newspaper restricted to the coverage of local events is published in Town S.
(E) The average newsstand price of newspapers sold in Town S in lower than the average price of newspapers sold in Town T.

10 Advertisement: For sinus pain, three out of four hospitals give their patients Novex. So when you want the most effective painkiller for sinus pain,     Novex is the one to choose.

Which of the following, if true, most seriously undermines the advertisement’s argument?
            

(A) Some competing brands of painkillers are intended to reduce other kinds of pain in addition to sinus pain.

(B) Many hospitals that do not usually use Novex will do so for those patients who cannot tolerate the drug the hospitals usually use.

(C) Many drug manufacturers increase sales of their products to hospitals by selling these products to the hospitals at the lowest price the manufacturers can afford.

(D) Unlike some competing brands of painkillers, Novex is available from pharmacies without a doctor’s prescription.

(E) In clinical trials Novex has been found more effective than competing brands of painkillers that have been on the market longer than Novex. C

我觉得这两道题的正确答案是同出一辙呀，但是一个确实不能削弱，一个确实可以削弱。问题在哪里呢？望指教！

gonghao

67

告诉我们S比T卖的好，所以S比T更加通晓新闻

问下面什么不能weaken

E说S的价钱低，那这解释了为什么S比T卖的好，但并不能削弱接下来的逻辑推理：卖得好---知道的多，而只能加强【卖的好】

10

4家里面有3家用N，文章最后的结论是，如果要找有效的，就选N。显然原文的逻辑是这样的：因为N肯定是有效的---所以N用的多

C用他因说明有其他原因导致N用的多，而并非有效，削弱。

wnlovess

版主，谢谢你的回复，很显然，我的误区在于对于10中，我的逻辑关系是：因为N用的多---所以N肯定是有效的，和您的刚好相反啊。

而67页说卖得好-〉S比T更加通晓新闻。所以我才觉得价格对这两道题的前提都是可以削弱的。

gonghao

67有点变态

表明的因果关系掩盖了真实的果因关系。

因：用的多

果：有效的

其实是因为有效，才造成用的多。