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标题: LSAT-2-4-22 [打印本页]

作者: flywood 时间: 2004-8-10 23:11
标题: LSAT-2-4-22

22. All intelligent people are nearsighted. I am very nearsighted. So I must be a genius.

Which one of the following exhibits both of the logical flaws exhibited in the argument above?

(A) I must be stupid because all intelligent people are nearsighted and I have perfect eyesight.

(B) All chickens have beaks. This bird has a beak. So this bird must be a chicken.

(D) John is extremely happy, so he must be extremely tall because all tall people are happy.

(E) All geniuses are very nearsighted. I must be very nearsighted since I am a genius.

毫无疑问,D是最好的答案,可是我觉得B似乎也可以,为什么把B排除?

作者: kingsoft 时间: 2004-8-10 23:51
标题: LSAT-2-4-22

i was also confused by the choice B

now, i encounter this problem for the third time, and i already knew the answer

Thus, i pay very attention to the difference between choice B and D

i found that as "genius" corresponds to "intelligent", "extremely tall" corresponds to "tall"

but choice B does not indicate this flaw

to be careful of the question:"...exhibits both of the logical flaws... "

i think this flaw is the difference between B and D

作者: Bensontuo 时间: 2019-8-4 14:10

kingsoft 发表于 2004-8-10 23:51
     i  was also confused by the choice B     now, ...

Spot the question types: Methods of the reasoning - Parallel Flaws.

A ---> B ( falsely assume A --- C )。So, B ---> C

Answers:

A. A ---> B, So No B ---> C ( Falsely assume No A ---> C )

B. A ---> B , B ---> A

C. A ---> B, C ---> D, Cd ---> 2Ab

D. A ---> B, C ---> B, So, A ---> C

E. A ---> B, So, A ---> C

No doubt, D is the best answer

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