标题: 请教费费逻辑的一题逻辑推理 [打印本页] 作者: Franceschiang 时间: 2012-3-14 17:49 标题: 请教费费逻辑的一题逻辑推理 23. On a certain day, nine scheduled flights on Swift Airlines were canceled. Ordinarily, a cancellation is due to mechanical problems with the airplane scheduled for a certain flight. However, since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day, some of the nine cancellations were probably due to something else. The argument depends on which one of the following assumptions?
A.More than one or two airplanes were scheduled for the nine canceled flights. B.Swift Airlines has fewer mechanical problems than do other airlines of the same size. C.Each of the canceled flights would have been longer than the average flight on Swift Airlines. D.Swift Airlines had never before canceled more than one or two scheduled flights on a single day. E.All of the airplanes scheduled for the canceled flights are based at the same airport.
参考答案：A 采用取非法。
思路：否定More than one or two airplanes were scheduled for the nine canceled flights.将削弱作者的结论。
A：取非削弱
B：无关。
C：无关。
D：无关。
E：无关。
解释看不懂啊？作者: sdcar2010 时间: 2012-3-14 21:45
Read my post on Necessary Assumptions.作者: mrj1104 时间: 2012-3-14 22:21
some of the nine cancellations were probably due to something else. 是结论 since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day, 是premise？作者: ainiAnnie 时间: 2012-4-25 18:54
some of the nine cancellations were probably due to something else. 是结论 since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day, 是premise？
-- by 会员 mrj1104 (2012/3/14 22:21:32)
是~作者: naoyixue 时间: 2012-4-25 22:06
其实assumption,就是对原文的里面说的原因进行补充或者限定，从而免除其他意外的可能，这样更保证原文结论的推出。 这个题目就是对原文原因”it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day“的限定，只有其余超过1到2架的飞机也是在取消的范围之内，才能证明这些飞机不是因为机械运行的问题。避免了下面情况： 同时有9次cancel,上面说的one or two 是另外每个cancel里面由于机械造成的原因