请教LSAT-1-1-11,12

falcons

11. Hanifah: A recent survey shows that there are fewer people who drive only on weekends than there are people who drive to work each weekday. As a result, weekend-only drives are involved in fewer accidents. Therefore, insurance rates should be adjusted so that rates would be significantly higher for the regular commuters.

Katsu: I can’t agree with your conclusion. The same study also showed that, although weekend-only drives are involved in fewer accidents, when considered on the basis of accidents-per-mile-driven their records are worse than those of regular commuters. Therefore, insurance rates should be adjusted to increase the rates of weekend-only drivers over those of regular commuters.

In the conversation above, Katus does which one of the following?

(A) Katsu disagrees with each of the premises of the argument that Hanifah offers.

(B) Katsu cites additional evidence stating that weekend-only drivers are actually involved in a greater number of accidents than regular commuters.

(C) Katsu accuses Hanifah of using inaccurate statistical information.

(D) Kasu proves that Hanifah didn’t read the entire report that was cited.

(E) Katsu disagrees with Hanifah over how accident records are to be evaluated for insurance rates.

答案：E，又是一个对话题，请问A为什么不对呢？
12. If Country X does not intervene militarily in Country Y, then the whole region will definitely fall under enemy influence.

It most logically follows from the statement above that, if Country X does intervene militarily in Country Y, then the whole region.

(A) Will definitely fall under enemy influence

(B) Will probably fall under enemy influence

(C) Will probably not fall under enemy influence

(D) Will definitely not fall under enemy influence

(E) May or may not fall under enemy influence

答案：E，请教做题的思路。

请问C、E有什么区别吗？

谢谢。

sammen

11H的逻辑是这样的，fewer people drive in weekend=>fewer involved in accident=>insurance rates be adjusted.我认为这里的前提和K的话没有关系。K只是对H对证据的使用进行了置疑.

12not a=>c,那么只能得出的是not c =>a，这是逆否命题是同真同假的。而逆命题和否命题的推倒是没有必然关系的，可以真也可以假。

braveMBA

1.要理解原文的思路. K并没有否定H的一个前提, 既"weekend-only drives are involved in fewer accidents". G承认了上面的这个事实, 但是从另一个角度得到自己的结论. A说G否认了H的所有前提是不对的.

2. 这道题以前有人问过.. probably是表示很可能, 程度上大于possible. 类似的词还有most等. 在原文的逻辑关系中得不到"很可能"这个意思. 只能是might or might not

falcons

可以这样理解吗？ If 。。。 does not。。。。, then　。。。。 will definitely 。。。. 否定就是： If 。。。 does 。。。。, then　。。。。 will might or might not 。。。. 如果这样是对的，我记住它就行了。

而对于第一题，不知我这样理解对不对？ the assumption in H is the insurance rate shall depend on the number of accidents, while the assumption in K is the insurance rate shall rely on the basis of the number of accident - per-mile, so I guess the choice of A is correct. Of course, E is also ok in this argument.

you5460

1 你说的否定是否命题的实际情况, 既否命题可能成立, 也可能不成立. 我认为你就记住否命题的形势: 原:A-->B 否:非A-->非B 可能成立, 也可能不成立 2 为什么A是对的? K并没有否定H的论据, 只是提出了自己的论据.

sammen

以下是引用falcons在2005-7-3 10:50:00的发言： 可以这样理解吗？ If 。。。 does not。。。。, then　。。。。 will definitely 。。。. 否定就是： If 。。。 does 。。。。, then　。。。。 will might or might not 。。。. 如果这样是对的，我记住它就行了。

我认为可以这么理解。