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"Life expectancy" is the average age at death of the entire live-born population. In the middle of the nineteenth century, life expectancy in North America was 40 years, whereas now it is nearly 80 years. Thus, in those days, people must have been considered old at an age that we now consider the prime of life.

Which of the following, if true, undermines the argument above?

正确答案: B

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GMAT 逻辑分析题 (8)

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楼主
发表于 2011-8-9 16:16:17 | 显示全部楼层
Scar2010,

Thank you very much for all the examples and the series of posts about CR.

I don't agree with you on this question.
Fierce competition --> m&m moment
m&m moment --> diehard fans
diehard fans --> understand the spirit of sports.

My understanding is that, fierce competition is a kind of objective phenominon but only people who're diehard fans can recognize it and enjoy it. To become a diehard fans you've to understand the sprit of sports.

So two parallel premises:
1, fierce competition
2, diehard fans
together treat the audience with m&m.

I agree that If there are NOT diehard sports fans in the audience, then there will not be a mesmerizing and memorable moment. But I disagree that "If there are no diehard sports fans in the audience, then there will be no fierce competition in the Asian Games in Guangzhou."
沙发
发表于 2011-8-10 14:47:52 | 显示全部楼层
Thank you sdcar2010.I was also wondering that I may take some of my own opinions into account for this question.

Fierce competition --> m&m moment
m&m moment --> diehard fans

If you acknowledge the above premises, then their contrapositives are correct:
No diehard fans --> No m&m moment
No m&m moment --> No fierce competition

Therefore, No diehard fans --> No fierce competition

For formal logic questions in CR, do not add your own objective/subjective opinions to the logic chains in the passage. Remember, we are analyzing the author's logic reasonings here, not yours. ONLY focus on the logic statements in the passage and go from there.
-- by 会员 sdcar2010 (2011/8/9 22:04:06)

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