OG11-15， C为何不对

m8888302 · 发表于 2010-2-14 19:11:42

a researcher studying drug addicts found that, on average, they tend to manipulate other people a great deal more than nonaddicts do. the resercher concluded that people who frequently manipulate other people are likely to become addicts.
which of the following, if true, most seriously weakens the researcher's conclusion?

a. after becoming addicted to drugs, drug addicts learn to manipulate other people as a way of obtaining drugs.
c. some nonaddicts manipulate other people more than some addicts do.

答案是A。为何C不对。。不懂

彼得豆 · 发表于 2010-2-14 20:39:31

我觉得吧，C的那个some说的就很牵强，some具体是多少……足以驳倒结论吗……都不是很清楚
可能一定程度上有削弱，但比起A就差多了

逛来晃去 · 发表于 2010-2-15 19:49:16

C答案跟题干相反吧。

我心匪席 · 发表于 2011-7-17 16:00:54

15题的A 应该是因果倒置的削弱
题干是指出经常manipulate other people的人更倾向于成为addicts,而A则指出成为addicts后，这些人才会试图manipulate other people为了。。。。

OG11-15， C为何不对

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