请教Powerscore 一道逻辑～

rx_11 · 发表于 2010-3-31 22:56:05

Most people who shop for groceries no more than three times a month buy prepared frozen dinners regularly. In Hallstown most people shop for groceries no more than three times a month. Therefore, in Hallstown most people buy prepared frozen dinners regularly.

Which one of the following arguments has a flawed pattern of reasoning most like the flawed reasoning in the argument above?

(A) It is clear that most drivers in West Ansland are safe drivers since there are very few driving accidents in West Ansland and most accidents there are not serious.
(B) It is clear that John cannot drive, since he does not own a car and no one in his family whodoes not own a car can drive.
(C) It is clear that Fernando’s friends usually drive to school, since all of his friends can drive and all of his friends go to school.
(D) It is clear that most people in Highland County drive sedans, since most people who commute to work drive sedans and most people in Highland County commute to work.
(E) It is clear that most of Janine’s friends are good drivers, since she accepts rides only from good drivers and she accepts rides from most of her friends.

请问为何题干FLAW了？我觉得很严密啊···
另外请问为何E错了。。Powerscore解释说E中有"only from"，这算是一种conditional reasoning, 而题干中没有conditional reasoning,所以E选项错。。但是题干第一句话不就是个conditional reasoning吗？people who 不就是个conditional reasoning 的indicator么？？

小弟求各位大侠解～～

fjatpku · 发表于 2010-3-31 23:33:48

A中60%是B，可以说most A are B
B中60%是c, most B are C
那么A中有36%是c，这时候就不能说most A are C了
两个most并起来就不一定是most了

most people who当然不是conditional reasoning了

rx_11 · 发表于 2010-4-1 09:18:53

谢谢～

请教Powerscore 一道逻辑～

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