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标题: og11-18 [打印本页]

作者: xiaojuming    时间: 2009-2-6 23:29
标题: og11-18

请教og11-18

Opponents of laws that require automobile drivers and passengers to wear seat belts argue that in a free society people have the right to take risks as long as the people do not harm others as a result of taking the risks.As a result, they concluded that it should be each person's decision whether or not to wear a seat belt.

答案是B:Automobile insurance rates for all automobile owners are higher because of the need to pay for the increased injuries or deaths of people not wearing seat belts

B到底从哪里weaken了conclusion呢?原文已经说了只要他们不harm others...


作者: fogwind    时间: 2009-2-6 23:52
不系保险带导致车主缴纳更高的保险费,这就伤害了车主的利益。
作者: helenwolf    时间: 2009-2-7 23:36

楼主一定是奇怪,答案为什么可以否定了前提因素:harm others,

一般来说前提由A 推出 B ,weaken结论 B 的时候不能否定A是错的,此题也是如此,前提是“人们应该有权利冒险”

但是,as long as not do harm to others ,并不是前提,只是逻辑推到的一部分,所以可以否定它,起到断桥削弱


作者: xiaojuming    时间: 2009-2-10 23:33

谢谢helenwolf。如果按照lawyer的分类,它应该属于削弱里的哪一类呢?该题应该是一般性结论。To be discussed...


作者: helenwolf    时间: 2009-2-11 13:24

lawyer的分类我真的不太清楚,Lsat我没看过

削弱一般分为他因削弱,和断桥削弱

此题是断桥,证明A不能推出B。来削弱结论,其中包括 :

1)A非 推 B ,

2)A 推 B非,

3)逻辑中项 C的出现,否定C的推导,

4)直接说A 推不出B(这样说的一般要好好看看别的,一般选项不这么出)

他因是 A可以推出B,但是C也可以推出B,所以削弱了A的必要性,

我就知道这些了。。。hehe

      


作者: tonylin0824    时间: 2009-3-22 14:42
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