求教一道逻辑题····崩溃中。。。

rx_11

Two things are true of all immoral actions. First, if they are performed in public, they offend public sensibilities. Second, they are accompanied byfeelings of guilt.

If all the statements above are true, then which one of the following must be false?

(A) Some immoral actions that are not performed in public are not accompanied by feelings of guilt.
(B) Immoral actions are wrong solely by virtue of being accompanied by feelings of guilt.
(C) Some actions that offend public sensibilities if they are performed in public are not accompanied by feelings of guilt.
(D) Some actions that are accompanied by feelings of guilt are not immoral, even if they frequently offend public sensibilities.
(E) Every action performed in public that is accompanied by feelings of guilt is immoral.

答案是啥··？我选D。。错了。。答案是A～～～WHY？？崩溃ING。。

kateysc

将A取非，变成Some immoral actions that are performed in public are accompanied by feelings of guilt.部分否定与原题all全部否定相反，所以该选项false。
原文中两个条件为A且B，缺一不可，所以其他选项都是正确的。对选项取非亦可知。

rx_11

THX~

mycontrol01

题里说了所有的不道德行为都有犯罪感

A里说部分(非公共场所发生的)不道德行为没有犯罪感   这不就矛盾了!

mycontrol01

A是错的啊...2L的解释的很好了嘛

rx_11

这题问的是which one is FALSE
跪求高人解释此题的Conditional structure···

felifeli

Two things are true of all immoral actions. First, if they are performed in public, they offend public sensibilities. Second, they are accompanied byfeelings of guilt.

If all the statements above are true, then which one of the following must be false?

(A) Some immoral actions that are not performed in public are not accompanied by feelings of guilt.
(B) Immoral actions are wrong solely by virtue of being accompanied by feelings of guilt.
(C) Some actions that offend public sensibilities if they are performed in public are not accompanied by feelings of guilt.
(D) Some actions that are accompanied by feelings of guilt are not immoral, even if they frequently offend public sensibilities.
(E) Every action performed in public that is accompanied by feelings of guilt is immoral.

答案是啥··？我选D。。错了。。答案是A～～～WHY？？崩溃ING。。

-- by 会员 rx_11 (2010/3/30 12:28:53)

因为原文说了immoral action都guilt, 所以不管它是不是pulic performed, 他都guilt.