SDCAR2010【逻辑入门】（八）Assumptions

女王的肥皂

6. Newspaper editorial:
In an attempt to reduce the crime rate, the governor is getting tough on criminals and making prison conditions harsher. Part of this effort has been to deny inmates the access they formerly had to college-level courses. However, this action is clearly counter to the governor’s ultimate goal, since after being released form prison, inmates who had taken such courses committed far fewer crimes overall than other inmates.
Which of the following is an assumption on which the argument depends?
A. Not being able to take college-level courses while in prison is unlikely to deter anyone from a crime that he or she might otherwise have committed.
B. Former inmates are no more likely to commit crimes than are members of the general population.
C. The group of inmates who chose to take college-level courses were not already less likely than other inmates to commit crimes after being released.
D. Taking high school level courses in prison has less effect on an inmate’s subsequent behavior than taking college-level courses does.
E. The governor’s ultimate goal actually is to gain popularity by convincing people that something effective is being done about crime.


原来的结论是，参加课程犯罪率低，现在不参加课程犯罪率高。

C项取非，参加课程的人更倾向不犯罪，这个和参加课程与否没有关系，所以在现在没有课程参加的情况下，犯罪率还是低的。

A选项取非，不能参加课程可能过吓唬住人不犯罪，现在不能参加课程，人就可能不犯罪，所以犯罪可能下降。

我还是不知道A项错在哪里了？

sdcar2010

likely does not equal must

郑璐34精精

看了一半了 加油

Amber1991

anybody help!
第2题还是不明白嘞。。。
main conclusion是 immune system能够protect against mental illness和physical illness。
我选的是b，因为argument没有提及关于physical illness的任何信息，那么如果negate b选项的话，即mental illness和physical illness是不一样的话，原结论不就错了吗？
我的思维经常异于常人的说，还请哪位指点迷津啊！

Amber1991

ps.:第6题终于终于终于搞懂了＝＝

lxt7

marvelous！大赞！！！

晓野的野

mark之~~~~~

hulinjie23

this post is damn great

Feelalive

sdcar2010真强大，mua~

sdcar楼主，您码了好多字！想请问您，大致是不是两种情况：(1)考察充分性，答案是补充gap；（2）考察必要性，答案取非削弱结论。

如中文来解释：
充分条件：如果有事物情况A，则必有事物情况B。
必要条件：如果没有事物情况A，则必然没有事物情况B。
初步分析，充分和必要都是以B为结论，考察充分性答案补充的是A到B之间的gap，考察必要性答案是取非A以至于B结论无法实现。
以上，纸上谈兵了。

么么哒sdcar2010,求确认。

Thanks in advance.

muxiadai

超有用！！！