请教一道逻辑题啊~

lanxiner01 · 发表于 2011-2-23 22:13:53

Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.Which of the following further observations would best support the new report's suggestion?

(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

有人能告诉我怎么推吗？

lanxiner01 · 发表于 2011-2-24 15:33:31

自己顶~

sdcar2010 · 发表于 2011-2-24 20:30:57

AAAAAAAAAAA

The stimulus says that
1) Y is BELIEVED to cause Z.
2) A new report suggests that X causes Z since X occurs earlier than both Y and Z.

A says that in the absence of Y, X occurs earlier than Z. This statement supports the notion that Y does not cause Z, but X causes Z.

huangyouhuifei · 发表于 2011-2-25 12:21:33

PREMISE1：Y has been believed to cause Z.
PREMISE2：A new report, noting that Y and Z are often observed to be preceded by X,
CONCLUSION：suggests that X, not Y, may be the cause of Z.
对于Y：无因有果，Y不发生，Z也发生
对于X：有因有果，X发生，Z发生

lanxiner01 · 发表于 2011-2-26 20:35:47

谢谢啦！！！

请教一道逻辑题啊~

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