分享一道manhattan的逻辑题，感觉比较搞……

小硕鼠UID: 3411565

答案贴二楼了
这，难道是我逻辑有问题么= =看了解析瞬间跪了……
Last year, after the number of subway riders who had had their pockets picked at Central Station had risen to an all-time high, the transit authority erected signs in Central Station telling riders to beware of pickpockets. In the year since the signs have been erected, though, riders have had their pockets picked at Central Station at a per-capita rate nearly double that before the signs were erected.
Which of the following, if true, helps to explain the discrepancy pointed out in the passage?

Since Central Station’s major renovation, during which the signs were erected, Central Station has become much more attractive to tourists from out of town.

Rising gas prices and a surging downtown job market have caused the daily number of riders at Central Station nearly to double within the past year.

Riders walking past the new signs tend to rummage through their pockets or feel through their clothes to verify the presence of their possessions.

The number of individuals convicted of petty theft or grand theft for picking pockets at Central Station has decreased within the past year.

Most of the pickpockets’ victims were riding the subway during peak travel hours, when Central Station is especially crowded.

小硕鼠UID: 3411565

(A) The riders’ city of origin is irrelevant to the frequency of pickpocketing, unless unwarranted assumptions are made about the vulnerability of out-of-towners to pickpocketing.

(B) A doubling of the number of riders at Central Station would help to explain a sharp rise in the absolute rate at which riders’ pockets are picked, but does not explain a rise in the per-capita theft rate. Although it is possible that the additional crowding induced by the new riders might raise the likelihood of pickpocketing, that inference would require additional assumptions.

(C) CORRECT. If riders walking past the new signs tend to rummage through their pockets or feel through their clothes to verify the presence of their possessions, then lurking pickpockets will be able to locate those possessions by watching the riders’ hands – something which will help them to steal the possessions, and which they were unable to do before the new signs were erected.

(D) In general, but especially because pickpocketing is a crime whose offenders largely go unpunished (because the crime is not discovered until well after the fact), there is no clear relationship between the frequency of pickpocketing and the rate at which offenders are convicted for it.

(E) No connection is made to the massive increase in pickpocketing during the last year, so this consideration is irrelevant.

vngogherUID: 3391684

其实解释一个矛盾现象就是找到一个之前没被发现的变量，这个变量导致了这种变化

kelin212UID: 3378566

这题是第几套里的？为啥我没遇到，难道小硕鼠跳到了Hard去了？

小硕鼠UID: 3411565

kelin212 发表于 2013-8-26 11:52
这题是第几套里的？为啥我没遇到，难道小硕鼠跳到了Hard去了？

我全medium的
那是题库抽的吧，不能一样吧……

小硕鼠UID: 3411565

vngogher 发表于 2013-8-26 11:44
其实解释一个矛盾现象就是找到一个之前没被发现的变量，这个变量导致了这种变化

我感觉脑补这答案太凶残了……

kelin212UID: 3378566

小硕鼠 发表于 2013-8-26 13:13
我全medium的
那是题库抽的吧，不能一样吧……

是这样噢，我以为只有easy,medium,hard三套呢。。。
之前看到Ben大说做完6套reset一下还会有不同的6套出来，你有试过了吗？

小硕鼠UID: 3411565

kelin212 发表于 2013-8-26 13:17
是这样噢，我以为只有easy,medium,hard三套呢。。。
之前看到Ben大说做完6套reset一下还会有不同的6套出 ...

我还没看，不过我瞄了一眼作文时一样的
晚上看

kelin212UID: 3378566

小硕鼠 发表于 2013-8-26 13:19
我还没看，不过我瞄了一眼作文时一样的
晚上看

恩恩，不过我也木有时间做了。。。