Lou observes that if flight 409 is canceled, then the : GMAT Critical Reasoning (CR)
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# Lou observes that if flight 409 is canceled, then the

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Lou observes that if flight 409 is canceled, then the [#permalink]

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24 Jul 2004, 21:34
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Lou observes that if flight 409 is canceled, then the manager could not possibly arrive in time for the meeting. But flight 409 was not canceled. Therefore, Lou concludes, the manager will certainly be on time. Evelyn replies that even if Lou's premises are true, his argument is fallacious. And therefore, she adds, the manager will not arrive on time after all.

A) Evelyn is mistaken in thinking Lou's argument to be fallacious, and so her own conclusion is unwarranted.

B) Evelyn is right about Lou's argument, but nevertheless her own conclusion is unwarranted.

C) Since Evelyn is right about Lou's argument, her own conclusion is well-supported.

D) Since Evelyn is mistaken about Lou's argument, her own conclusion must be false.

E) Evelyn is right about Lou's argument, but nevertheless her own conclusion is false.
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25 Jul 2004, 06:44
I'd say E. not sure if there is any diff between B and E
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Re: CR - flight 409 [#permalink]

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25 Jul 2004, 07:08
anuramm wrote:
Lou observes that if flight 409 is canceled, then the manager could not possibly arrive in time for the meeting. But flight 409 was not canceled. Therefore, Lou concludes, the manager will certainly be on time. Evelyn replies that even if Lou's premises are true, his argument is fallacious. And therefore, she adds, the manager will not arrive on time after all.

A) Evelyn is mistaken in thinking Lou's argument to be fallacious, and so her own conclusion is unwarranted.

B) Evelyn is right about Lou's argument, but nevertheless her own conclusion is unwarranted.

C) Since Evelyn is right about Lou's argument, her own conclusion is well-supported.

D) Since Evelyn is mistaken about Lou's argument, her own conclusion must be false.

E) Evelyn is right about Lou's argument, but nevertheless her own conclusion is false.

I favor B. Both B and E says Evelyn is right about Lou's argument being fallacious. But E goes on to state that her own conclusion is false. That would mean we, the readers, are saying that her argument is false. Unwarranted would be a better choice, since this word would go to say Evelyn's argument is unjustified, which is indeed the case.
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25 Jul 2004, 20:10
The OA is B. explanation -
(B) It is useful to notice that all of the alternatives have at least two parts-one is about Lou's argument and the other is about Evelyn's conclusion, so we might try to evaluate Lou's argument first. It is certainly fallacious. (Logicians sometimes call this fallacy 'Denying the Antecedent'). We can see that it is fallacious because there are many other factors that might keep the manager from arriving on time: he may have missed the flight because of traffic delays, or he may have felt ill and canceled his trip, and so on. That eliminates responses (A) and (D). If we were to choose response (E), we would ourselves be committing the same fallacy we just ascribed to Evelyn. The fact that Evelyn's argument is fallacious does not necessitate that her conclusion is false. Nothing else in the problem gives us a reason for thinking that the manager will not arrive on time, so (E) is not correct. (B) is correct. Evelyn is right about Lou's argument. And her own conclusion, even if it happens to be true, is unsupported by anything she has said in this interchange.
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# Lou observes that if flight 409 is canceled, then the

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