标题: 请教一题bible上的LR [打印本页] 作者: lindeman 时间: 2010-11-8 21:06 标题: 请教一题bible上的LR 这题看了答案没看明白。 vague laws set vague limits on people's freedom,which makes it impossible for them to know for certain whether their actions are legal. thus,under vague laws people cannot feel secure.
A.people can feel secure only if they know for certain whether their actions are legal.
B.if people do not know for certain whether their actions are legal,then they might nit feel secure.
C.if people know for certain whether their actions are legal, they can feel secure.
E.only people who feel secure can know for certain whether their actions are legal.
D是无关选项，就不列出了。 请教一下大家这题怎么做，错误选项为什么是错的。请赐教，谢谢。作者: sdcar2010 时间: 2010-11-8 22:41
Premise: Vague laws --> impossible to be certain of legality Conclusion: Vague laws --> not secure
The gap is between "impposible to be certain of legality" and "not secure". If the assumption is : impossible to be certain of legality --> not secure, the argument is complete. Answer choice A fits the bill, although it is in the countrapositive mode of the original assumption.作者: lindeman 时间: 2010-11-9 00:32
thank you! i failed to consider the negativity.作者: taoransk 时间: 2010-11-13 09:54
Sdcar always provide the best answer ~作者: Bensontuo 时间: 2019-9-2 15:16
首先吧, 下次貼題目, 請把題幹一起完整的post上來, 不然不知道題目到底在考什麼。
Anyway, 來看論證吧。
Vague law ---> Vague limit on people's freedom ---> Impossible to know whether their actions are legal.
" Impossible to know whether their actions are legal ---> People can't feel secure " = > " People can feel secure ---> possible to know whether their actions are legal "