标题: 请教一道逻辑题啊~ [打印本页] 作者: lanxiner01 时间: 2011-2-23 22:13 标题: 请教一道逻辑题啊~ 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.
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.作者: huangyouhuifei 时间: 2011-2-25 12:21
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发生作者: lanxiner01 时间: 2011-2-26 20:35
谢谢啦！！！