[求助]Lsat-1-1-14

amo

14.   Either Perry’s faction or Tucker’s faction, but not both, will win control of the government. If Perry’s faction wins, the nation will suffer economically. If Tucker’s faction wins, the nation will suffer militarily.

Given the statements in the passage, which one of the following statements must be true?

(A) It is possible, but not certain, that the nation will neither suffer economically nor suffer militarily.

(B) If the nation suffers economically, it is certain that Perry’s faction has won control of the government.

(C) It is certain that the nation will suffer either economically or militarily, and also certain that it will not suffer both.

(D) If the nation suffers militarily, it is possible, but not certain, that Tucker’s faction has won control of the government.（D）

(E) If the nation suffers both economically and militarily, it is certain that neither Perry’s faction nor Tucker’s has won control of the government.

答案D 文中的前提都只是充分条件，都不能确定无疑的推出特定的结论，所以只要选项中有确定的保证certain的就是错的，但是A是not certain，为什么A不是答案呢？

weiyu

P或T要上任. 不存在P,T都不上任的情况

linxch2003

i think the right answer is (b),


could u please help me explain by why the key is (d)?

weiyu

以下是引用linxch2003在2004-3-31 22:05:00的发言：
i think the right answer is (b),



could u please help me explain by why the key is (d)?

P->经济问题; B经济问题->是否命题

amo

    

再问Lsat-t1-s1-14：为什么C和E是错误的，他们犯了哪一点逻辑错误？fficeffice" />

lawyer_1

C错的原因: 可能SUFFER BOTH. 两者都存在和题干没矛盾

E错的原因: 两者都存在时,任一个党派都可能控制