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Let's split the question: 1.) LD to improve car efficiency increases production. If these figures are accurate then this is huge success. 2.) A brilliant mathematician claims, that however this could not true. So, basically from the question - one claimed to increase something by so much. if the effort was correct then success. one expert says however ain't true. the erroneous pattern here (according to me), does not explain why the expert says that the claim cannot be true.
coming to ans: a and b are clearly out.
c) amos claim to hold his breath, but an expert says he cannot = hold it (second suspect) d) evelyn claims she came home before midnight, but robert who knows the time (but not an expert), said she did not = this kind off argument is not stated in the q/stem e) moira reports lee won with adam's with a distant third, an expert says it cannot be possible. he does not say why it cannot be possible.
IMO it is "E". I'll wait for more explanations and OA.
Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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I think the biggest difference between C and E is that, in C the specialist's opinion is a general one, not attacking the original claim directly. The Dr. is not concerned about Amos' record, but exposes a fundamental fact about human beings, isn't it. In E is the specialist directly hits Moira's claim.
But, I am not that impressed by this Q overall. The prompt first presented a causal argument, if A then B, and then a specialist opines that B is not true. On that basis, author claims that A cannot be true. I was looking for an answer choice that resembles this method of reasoning. But, alas, no choice actually does so.
Hope I helped a little.
Re: Try this....good one
09 Dec 2015, 07:27