OG上的一道逻辑题请求解答！

nicetao

Springfield Fire Commissioner: the vast majority of false fire alarms are prank calls made anonymously from fire alarm boxes on street corners. Since virtually everyone has access to a private telephone, these alarm boxes have outlived their usefulness. Therefore, we propose to remove the boxes. Removing the boxes will reduce the number of prank calls without hampering people's ability to report a fire.

Which of the following, if true, most strongly supports the claim that the proposal, if carried out, will have the announced effect?

• The fire department traces all alarm calls made from private telephones and records where they came from.
• Maintaining the fire alarm boxes costs Springfield approximately $5 million annually.
• A telephone call can provide the fire department with more information about the nature and size of a fire than can an alarm placed from an alarm box.
• Responding to false alarms significantly reduces the fire department’s capacity for responding to fires.
• On any given day, a significant percentage of the public telephones in Springfield are out of service.
  

答案是A
我不明白的是这道题的逻辑链
大多数的错报都来自报警箱。大多数报警电话都可以通过私人电话这些报警箱就没用了（事实）——移除箱子会减少错报电话且不影响人们报警（推论）
答案：火警部门可以追踪到私人报警电话的路径


我感觉是无关的呀。。。既没有排除其他因素也不是举例子支持推论
前面100多道题都这么总结过来了啊。。。到这道题我慌了。。。
求NN们解答

fuxingchen

1.P：移除箱子->C：减少错误报警且不影响报警能力
2.因果结构找加强
3.
A、排除了手机会影响报警能力的可能性
B、和cost无关  
C、这个选项在对比手机和报警boxes对于火情信息的描述能力  和PC无关
D\E、这两个和PC无关 无关的离谱

非NN，希望对你有帮助~ 哪里不明白 我继续解释。

nicetao

fuxingchen 发表于 2017-7-16 20:53
1.P：移除箱子->C：减少错误报警且不影响报警能力
2.因果结构找加强
3.

谢谢解答
BCDE是能排除的，，，
但是我想不明白A到底和原文逻辑有什么关系。。。
火警部门可以追踪到私人报警电话的路径
追踪到路径就能减少错报了吗？并没有感觉到加强。。