20. Ann will either take a leave of absence from Technocomp and return in a year or else she will quit her job there; but she would not do either one unless she were offered a one-year teaching fellowship at a prestigious university. Technocomp will allow her to take a leave of absence if it does not find out that she has been offered the fellowship, but not otherwise, Therefore, Ann will quit her job at Tedhnocomp only if Technocomp finds out she has been offered the fellowship.
Which one of the following, if assumed, allows the conclusion above to be properly drawn? (A) Technocomp will find out about Ann being offered the fellowship only if someone informs on her. (B) The reason Ann wants the fellowship is so she can quit her job at Technocomp. (C) Technocomp does not allow any of its employees to take a leave of absence in order to work for one of its competitors. (D) Ann will take a leave of absence if Technocomp allows her to take a leave of absence. (E) Ann would be offered the fellowship only if she quit her job at Technocomp.
我研习了各位大大的心法数遍，但是这道题让我彻底郁闷，没有思路，10分钟没做出来，请求告人指点迷津。详细思路。谢谢
1) Either “Ann takes a leave”, or “Ann quits her job’
2) Tachnocomp does not find out---------allow her to take a leave
3) Technocomp finds out-------------------not allow her to take a leave
4) Conclusion: Ann quit her job----------Technocomp finds out
Ann will quit her job, namely, she will not take a leave (according to 1)
Technocomp finds out, namely, she will not be allowed to take a leave (according to 3)
So the Conclusion is something like: Ann will not take a leave only if she is not allowed to take a leave
“Ann will not take a leave” includes two possibilities:
(1) ----- if Ann is not allowed to take a leave
(2) ------if Ann is allowed to take a leave, but she does not
it has to be assumed that (2) does not exist
D
这道题目是很郁闷啊，我是用排除法做出来的. 考试的时候是不可能做上面这种推断的, 越推越糊涂
3) Technocomp finds out-------------------not allow her to take a leave
“but not otherwise, ” 就是这个条件我没有用到！出错了。
谢谢斑竹！
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