not weaken型题？

xiaojianzhu

到底怎么样的假设题可以用not weaken 来做啊？

还是不懂啊遇到这种？

请教详解？

windslow2002

这个问题没法回答，举个例子先

xiaojianzhu

就是不是有很多假设题要用not weaken 方法来解答么？

怎么来区别哪些假设题要用这个方法啊

hollygrail

    

1. ASSUMPTION

    

 An assumption is
something that must be true in order for the argument’s conclusion to be
established by the evidence the argument gives.

所以assumption的实质是必要条件.

1.1取非型
        
    

      理论根据: 如果B是A的必要条件,即A->B 同时应该满足 ~B->~A, 即假设如果不成立,原结论也不成立.

例子:


    

OG8. To prevent some conflicts of interest, Congress could prohibit
high-level government officials from accepting positions as lobbyists for three
years after such officials leave government service. One such official
concluded, however, that such a prohibition would be unfortunate because it
would prevent high-level government officials from earning a livelihood for
three years.

    

 

    

The official’s conclusion logically depends on which of the following
assumptions?

    

A. Laws should not restrict the behavior of former government officials.

    

B. Lobbyists are typically people who have previously been high-level
government officials.

    

C. Low-level
government officials do not often become lobbyists when they leave government
service.

    

D. High-level government officials who leave government service are
capable of earning a livelihood only as lobbyists.
            D

    

E. High-level government officials who leave government service are
currently permitted to act as lobbyists for only three years.

理论上所有的assumption选项都可以用取非验证.
实战中取非只用于验证或者剔除候选选项.