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题库 / OG2020-CR-673
Farmer:Several people in the past few years have claimed to have seen a mountain lion in the suburban outskirts—the latest just last month—and, while mountain lions were thought to have been driven from this entire region about twenty years ago, there is no reason for the people who reported seeing a mountain lion to have deliberately concocted a false report. Therefore, local wildlife managers should begin to urgently address the mountain lion's presence.
Which of the following would, if true, most seriously weaken the farmer's argument?
Farmers in the suburban outskirts mostly raise cattle and hogs, which when fully grown are generally not attacked by mountain lions.
Mountain lions are dissimilar in size and color to other wild animals found near the suburban outskirts.
No person who claimed to have seen a mountain lion had anyone else with them at the purported sighting.
There have been no regional reports in the past year of mountain lions migrating to the area.
Recent surveys show that more than half of the people in the region report that they have never seen a mountain lion before.
情景：farmer: 最近有人说自己在郊区看到了狮子，但20年前就狮子就已经被赶出这片区域了。我们没有理由怀疑声称自己看到狮子的人谎报。因此，当地的管理员应该赶紧去证实狮子的存在。
推理：从发生顺序上来说，是先有狮子存在，才能有人看见狮子，所以此为果因推理
（果）前提：有人声称看到狮子
（因）结论：狮子存在
选项分析：
A选项：郊区的农民会养牲畜，当牲畜长大之后也不会被狮子袭击：无关，无法证明到底有没有狮子。
B选项：狮子和郊区附近的其他野生动物在形体和颜色上不一样：一定程度起到了加强作用，排除了农民把别的野生动物当作狮子的可能性。
C选项：正确。那些声称看到狮子的人没有一个是有别人陪同的：没有人可以证实这些农民真的看到了狮子，原因上出了问题，切断了因果联系。起到了削弱作用。
D选项：没有当地的报告称过去几年有狮子迁徙到这篇区域：无关。没有报道不代表没有狮子。
E选项：最近的调查显示，这个区域的人超过一半声称他们之前没见过狮子：与见过或者没见过狮子的人的数量无关。我们要讨论的是到底有没有狮子。
我明白C 的意思，但是我就是觉得很牵强啊，所以我选了D ，有人能解释一下为什么D 无关吗？没迁徙记录这不就说明了很可能没狮子吗？以及，没有同行的目击者怎么就削弱了，他这是好几个目击者于不同的时间点目击到的，有没有人同行有什么要紧的？这个削弱也未免太不明显了吧
我也是觉得c是质疑了前提，才没选的，既然前提已经是事实了，为什么要质疑呢，不懂
对啊，C为什么不是质疑前提。。
题干中说的是in the past few years, people 都claim 看到狮子，说明狮子早就在这个地区几年了。但D 说的是in the past year狮子没有迁移过来，完全有可能——自然不能削弱选项。C的话，我的理解是三人成虎，一个人说这是狮子，其他人都这样说。OG 上的说法说，如果两个人一起的话，很可能误认为狮子后，同行者会纠正他。
我觉得不是质疑前提吧，C质疑的 从premise 到conclusion 这一个reasoning 的过程。
P1: several people claim to see a lion
P2: people have no reason to cheat
C: local wildlife managers should begin to address the lion's presence
GAP: Even people have no reason, is there any possible that people have mistakenly believe they have seen a lion when in fact they saw sth else
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