OG 第89题

virgmat

哪位大侠能帮忙解释下OG第89题？

89.Since it has become known that several of a bank’s top executives have been buying shares in their own bank, the bank’s depositors, who had been worried by rumors that the bank faced impending financial collapse, have been greatly relieved.
They reason that since top executives evidently have faith in the bank’s financial soundness, those worrisome rumors must be false.
They might well be overoptimistic, however since corporate executives have sometimes bought shares in their own company in a calculated attempt to dispel negative rumors about the company’s health.

In the argument given, the two boldfaced portions play which of the followng roles?

A. The first describes evidence that has been taken as supporting a conclusion; the second gives a reason for questioning that support.
B. The first describes evidence that has been taken as supporting a conclusion; the second states a contrary conclusion that is the main conclusion of the argument.
C. The first provides evidence in support of the main conclusion of the argument; the second states that conclusion.
D. The first describes the circumstance that the argument as a whole seeks to explain; the second gives the explanation that the argument seeks to establish.
E. The first describes the circumstance that the arument as a whole seeks to explain; the second provides evidence in support of the explanation that the argument seeks to establish.
怎么理解都觉得D是对的，但答案是A.

virgmat

自己顶顶，期待大侠出现〜

virgmat

再顶顶

chitowngudrifle

第二段不是在给之前的conclusion提供explanation.它在挑战之前的explanation.
从逻辑学的角度,第二段粗体字之前的话已经是完整的argument.

p1) Executives are buying their own stock.
p2) If executives are buying their own stock, then it's an indication that they have faith in their own stock.
p3) If executives have faith in their own stock, then depositors will not be worried that bank may be facing financial collapse.
c1) Depositors are not worried.

所以第二段粗体字提出了新的解释,也就是a里所说的questioning that support.

virgmat

chitowngudrifle 发表于 2013-9-1 10:38
第二段不是在给之前的conclusion提供explanation.它在挑战之前的explanation.
从逻辑学的角度,第二段粗体字 ...

如果结论是those worrisome rumors must be false,那我就认同答案A。
可是为什么不能认为结论是such reasoning might well be over optimistic?
我的思路是这样的。。。。

Background:
Since it has become known that several of a bank’s top executives have been buying shares in their own bank, the bank’s depositors, who had been worried by rumors that the bank faced impending financial collapse, have been greatly relieved.

opposing opinion:
They reason that since top executives evidently have faith in the bank’s financial soundness, those worrisome rumors must be false.

Conclusion:
They might well be overoptimistic.

Premise:
however since corporate executives have sometimes bought shares in their own company in a calculated attempt to dispel negative rumors about the company’s health.

如果按照这样的思路，那D就对了， 不知道这样的思路是否有问题？

chitowngudrifle

virgmat 发表于 2013-9-1 11:36
如果结论是those worrisome rumors must be false,那我就认同答案A。
可是为什么不能认为结论是such reas ...

conclusion不是They are overoptimistic. Rumors are false是conclusion.

virgmat

chitowngudrifle 发表于 2013-9-1 11:49
conclusion不是They are overoptimistic. Rumors are false是conclusion.

好吧，我只是觉得我的思路也貌似很合理。。。。。

chitowngudrifle

virgmat 发表于 2013-9-1 11:51
好吧，我只是觉得我的思路也貌似很合理。。。。。

这么想，你的background和opinion加起来能得到"They are overoptimistic"的吗？“They are optimistic”不是由第二段黑体字暗示的吗？

franciszfy

virgmat 发表于 2013-9-1 11:36
如果结论是those worrisome rumors must be false,那我就认同答案A。
可是为什么不能认为结论是such reas ...

呵呵，我的思路跟你是一摸一样，我也在选项中找XP这种类型的，也是选了D，现在还是不明白为什么错了，你现在懂了吗？

enkyklios

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