33.During a single hour, an automatic camera photographed 100 vehicles that were speeding on a one-way road, and poloce a mile farther down the road photographed 49 vehicles that were speeding. SInce every vehicle that pssed the aytomatic camera also passed the police during the hour, the police photographed fewer than half og the vehicles that were speeding when passing them.
Which of the following is an assumprion on which the reasonging in the argument above depends?
C Most of the vehicles that were speeding when they passed the automatic camera were still speeding when they passed the police.
刚学逻辑不久，特来请教各位这个题目，答案是C。。但是我总不理解为什么要选C。题目里明明说的是相机照到的超速的100 警察照的是是49辆，然后通过相机的车 也经过了警察。。然后C里说大部分在相机面前超速的车在通过警察时仍然超速。。这个假设怎么能说明警察照的少呢？按照这个说法应该警察照的也跟相机照的超速的一样多呀。 疑惑了很久特来请教大家。。是不是我的理解方面出现问题呢？
题干的逻辑是这样的：
理由：1 自动照相机拍到100辆超速车，而警察人工只拍到49辆超速。 2 经过自动照相机的车辆后来也都经过了警察。
推论：the police photographed fewer than half og the vehicles that were speeding when passing them.（警察只拍到了经过超速驶过他们的车辆中的不到一半）。（意思就是还有大量车经过他们的时候也在超速，而他们漏拍了。）
这里要说明一下，vehicles that were speeding when passing them，这里明确讲到，不是经过自动照相机时候超速的那100辆车，而是经过警察时候超速的车，这个数字不知道。
这个因果关系中间中间是缺一环的，就是可能有车辆经过自动照相机时候超速，而经过警察的时候没有超速。如果经过警察的时候确实只有49辆车子超速，而警察确实拍到49辆，那就不能说是警察漏拍。
所以C提供了一个必要的补充，说明之前的那100超速车辆随后在经过警察的时候依然在超速。那么警察只拍到49肯定是严重漏拍了。
如果没有C，由于车辆经过两个测速点的时候车速可以变化，之前超速的车之后可以不超速。那么自动照相机的100和警察所拍到49超速车辆数字之间就不存在可比性，也就无法得出警察严重漏拍的结论了。
题目提到了，警察照到的车辆，是超速的，但是少了1半。题目想说明，警察的牌照有问题。
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