陈向东逻辑-归纳-不是外向的人也能做演员么

evelyn205205 · 发表于 2011-7-9 17:14:18

All actors are exuberant people and all exuberant people are extroverts, but nevertheless it is true that some shy people are actors.

If the statements above are true, each of the following must also be true EXCEPT?

A.Some shy people are extroverts

B.Some shy extroverts are not actor.

C.Some exuberant people who are actors are shy.

D.All people who are not extroverts are not actors.

E.Some extroverts are shy.

答案是B。
我选的是D。因为我认为：所有不外向的人都不是演员这样的说法太绝对了，就把D否决了，因此看到答案是B后，很纳闷。

sdcar2010 · 发表于 2011-7-9 20:04:38

This is an old LSAT question, a combination of formal logic and inference type of question.

Translating English questions into Chinese is time-consuming and, sometimes, misleading, when solving CR questions.

must also be true EXCEPT = might be wrong.

So your thinking that D) is too restictive SHOULD put it as the correct answer, since it might be wrong.

evelyn205205 · 发表于 2011-7-9 20:33:38

I still can't figure out why D might be wrong.
I think it must be wrong. How can anyone say that all people who are not extroverts are not actors？
There must be someone who is not extrovert is an actor.

nikita1990 · 发表于 2011-7-9 22:35:54

"All people who are not extroverts" 超出stimulus范围吧不能从原文推出的貌似
其它选项中.Some shy people
.Some shy extroverts
.Some are shy都是范围相同加上推理正确就应该是对的吧

不过D是不是原文逆否命题我也很糊涂啊~ 求指点

evelyn205205 · 发表于 2011-7-9 22:37:05

恩，求NN的指教。

evelyn205205 · 发表于 2011-7-10 11:22:30

求指教！谢谢！

sdcar2010 · 发表于 2011-7-10 11:25:09

LZ, if a statement is "must-be-wrong," then the same statement is definitely "might-be-wrong."

evelyn205205 · 发表于 2011-7-18 18:14:35

还是不理解啊，我是头笨N，呜呜，有谁来帮帮我~

weijiejing · 发表于 2011-7-18 19:54:18

答案上这道是B啊
LZ眼花了?

evelyn205205 · 发表于 2011-7-19 11:12:33

sorry，sorry，答案是B。
我的疑问是为什么不选D，D不是表达的太绝对了么？

陈向东逻辑-归纳-不是外向的人也能做演员么

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