缘的寂静森林

前些日子闲着无聊听了新东方号称“耶鲁匕首”钱永强的一则关于ＧＲＥ的讲座，题目叫《GRE机考逻辑数学最新趋势及学习方法》。一看就知道是很多年以前的东东了，还机考，“机经”造就无数神话般的２４００分的美好时代。钱大叔果然思维敏捷，咚咚咚地让人听的欲罢不能。话说其中提到史上ＧＲＥ逻辑之最难题，偶用纸笔记录之，按照钱叔的中文语音稍一琢磨便得出答案也。后而想找原题，于百度上输入相关语句搜索，不想咣当出现“０５公务员考试练习题”。原来ＧＲＥ难题译成中文后不过而而，中国人报考人数最多的公务员考试的练习题，还是习题（一）

The organizers of tomorrow’s outdoor concert announced that it will go on tomorrow on schedule unless bad weather is forecast or too few advance tickets are sold. If the concert is canceled, refunds will be made to ticket holders. Since some ticket holders have already been issued refunds even though more than enough advance tickets were sold, it must be the case that bad weather is forecast.

Which of the following is an error of reasoning contained in the argument?

(A) It proceeds as if a condition, which by itself is enough to guarantee a certain result, is the only condition under which that result would occur. 

(B) It bases a conclusion that is known to require two conditions on evidence that bears on only one of those conditions.

(C) It explains one event as being caused by another event, even though both events must actually have been caused by some third, unidentified event. 

(D) It treats evidence for the absence of one condition under which a circumstance would occur as conclusive evidence that that circumstance will not occur. 

(E) Evidence given to support the conclusion actually undermines it. 


室外音乐会的组织者宣布，明天的音乐会将如期举行，除非预报了坏天气或预售票卖得太少了。如果音乐会被取消，将给已买了票的人退款。尽管预售票已卖得足够多，但仍有一些已买了票的人已经得到了退款，这一定是因为预报了坏天气的缘故。

下列哪一项是该论述中含有的推理错误?

(A)该推理认为如果一个原因自身足以导致其一结果，那么导致这个结果的原因只能是它。

(B)该推理将已知需要两个前提条件才能成立的结论建立在仅与这两个条件中的一个有关系的论据基础之上。

(C)该推理仍解释说其中一事件是由另一事件引起的，即使这两件事都是由第三件未知的事件引起的。

(D)该推理把缺少某一事件会发生的一项条件的证据当作了该事件不会发生的结论性证据。

(E)试图证明该结论的证据实际上削弱了该结论。

答案在评论里！！真的偶自己做的！！
切，吹一下又不会死～