困惑的假设逻辑真题

睡熊 · 发表于 2003-11-14 23:56:00

In casual conversation, people experience little psychological discomfort in admitting that they have some particular character flaw, but only if they consider trivial the flaw to which they admit. Therefore, if in a casual conversation an individual readily admits that he or she has some particular character flaw, the individual must not consider that flaw to be serious.

Which one of the following is an assumption necessary to the argument?
(A) Most character flaws are considered trivial by those who have them.
(B) People admit to having only those character flaws that most other people consider trivial.
(C) In casual conversation, people admit to having character flaws only when they must.
(D) In casual conversation, people readily admit to having a character flaw only when that admission causes them little psychological discomfort.
(E) In casual conversation, people do not speak of things that would give others an unfavorable impression of their character.

没有思路，答案是D, E为什么不对呢？求教分析，谢谢！

lixiaoyang · 发表于 2003-11-15 00:18:00

其实题目中有三个条件，由两个：trivial and admit character flaw=>little discomfort,
D选项有机的联系了这三个。而e,出现了一些新概念，不选。做assumtion, 如果觉得难，那就运用否定法，加个not 看成立么

睡熊 · 发表于 2003-11-15 01:13:00

非常谢谢 lixiaoyang！
做假设题最怕用 Not，当初上费费的逻辑从头到尾就是没明白用手按住Not 怎么看剩余的部分。

Eleanoryf · 发表于 2003-11-15 12:15:00

I am confusing too. What is the premise and what is the conclusion? Awaiting your analysis..

xiang_y · 发表于 2003-11-15 14:29:00

Line of reasoning in the passage:
Premise: A -> B
If people consider the character flaw trivial (not serious) -> people admits the character flaw with little psychological discomfort

Conclusion: A -> C
If people consider the character flaw trivial (not serious) ->people readily admits the character flaw

Assumption (bridge between premise and conclusion ): B -> C
If people admits the character flaw with little psychological discomfort -> then people readily admits the character flaw

睡熊 · 发表于 2003-11-15 14:34:00

Excellent! Thanks.

dandan74 · 发表于 2003-11-16 02:14:00

only if是必要条件，不是充分条件。
A only if B的意思是A->B, 而不是B-> A.
这道题的思路是：
people experience little psychological discomfort -> they consider trivial the flaw to which they admit A->B
in a casual conversation an individual readily admits that he or she has some particular character flaw -> the individual must not consider that flaw to be serious C->B
答案：搭桥
people readily admit to having a character flaw —>admission causes them little psychological discomfort. C->A

xiang_y · 发表于 2003-11-16 06:38:00

谢谢楼上，我正好把两个必要条件都写成充分条件了，所以居然也成立了。

dorbear · 发表于 2003-11-19 12:56:00

谢谢dandan74，这道题我也有点糊涂，现在明白了。

困惑的假设逻辑真题

困惑的假设逻辑真题

所属分类: GMAT考试

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