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LSAT-Set12-SecII-Q22

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楼主
发表于 2003-4-15 23:08:00 | 只看该作者

LSAT-Set12-SecII-Q22

22. Oil company representative: We spent more money on cleaning the otters affected by our recent oil spill than has been spent on any previous marine mammal rescue project. This shows our concern for the environment.

Environmentalist: You have no such concern. Your real concern is evident in your admission to the press that news photographs of oil-covered otters would be particularly damaging to your public image, which plays an important role in your level of sales.

The environmentalist's conclusion would be properly drawn if it were true that the

(A) oil company cannot have more than one motive for cleaning the otters affected by the oil spill

(B) otter population in the area of the oil spill could not have survived without the cleaning project

(C) oil company has always shown a high regard for its profits in choosing its courses of action

(D) government would have spent the money to clean the otters if the oil company had not agreed to do it

(E) oil company's efforts toward cleaning the affected otters have been more successful than have such efforts in previous projects to clean up oil spills
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答案A, 为何C不对?A也未必能使环境学家结论成立?请大家指教.

沙发
发表于 2003-4-16 04:50:00 | 只看该作者
>A也未必能使环境学家结论成立?

有道理。但题目问的是假设,即必要条件,不是充分条件。如果A不成立,环境雪茄的推理不可能正确。C仅是前提的改写,未能提供假设。
板凳
 楼主| 发表于 2003-4-16 10:53:00 | 只看该作者
谢谢版主解答,所以假设是结论的充分条件,结论是假设的必要条件?不知我理解得是否正确?
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