GMAT 逻辑分析题 (8)

sdcar2010

If there is any fierce competition in the Asian Games in Guangzhou, the attending audience will be treated to a mesmerizing and memorable moment. But there will not be a mesmerizing and memorable moment unless there are diehard sports fans in the audience. To be a diehard sports fan, one must understand the spirit of sports.

If all the statements above are true, which one of the following statements must also be true?

A) If there are no diehard sports fans in the audience, then there will be no fierce competition in the Asian Games in Guangzhou.

B) No people who understand the spirit of sports will be in the audience if the audience will not be treated to a mesmerizing and memorable moment.

C) If there will be people in the audience who understand the spirit of sports, then at least one competition in the Asian Games in Guangzhou will be fierce.

D) The audience will be treated to a mesmerizing and memorable moment unless there are people in the audience who do not understand the spirit of sports.

E) If there are diehard sports fans in the audience, then there will be fierce competition in the Asian Games in Guangzhou.

livebelieve

我发现，一般有三句话的句子，只要把前两句的关键词抽出来就好，第三句讲了啥根本没所谓。。。。

kathyrn

谢谢楼主

sdcar2010

sdcar, I have a question about the trigger. Is it something that appears in the stimulus? I saw you say sufficient conditon, so I think the trigger must appear as it does in the stimulus, am I right?

-- by 会员 corrine90 (2011/8/20 9:52:35)

That's right. The trigger is the sufficient condition in a logic statement. Because without the trigger, you won't logically reach the necessary condition.

corrine90

sdcar, I have a question about the trigger. Is it something that appears in the stimulus? I saw you say sufficient conditon, so I think the trigger must appear as it does in the stimulus, am I right?

jeffxu

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)

AlohaDJ

Thks NN for the explanations.

My summary from this question:
1. A unless B: A ->B (after UNLESS is a necessary condition)
2. To / in order to represents the if-part in if-then statements.

-- by 会员 AlohaDJ (2011/8/10 1:37:05)

A unless B:   Not A --> B (You have to negate the claim in A to make it a sufficient condition).

Not A unless B: A --> B

-- by 会员 sdcar2010 (2011/8/10 2:35:13)

oh..YES!! Negation of A is indispensable here!
THKS NN for pointing it out!!

sdcar2010

Thks NN for the explanations.

My summary from this question:
1. A unless B: A ->B (after UNLESS is a necessary condition)
2. To / in order to represents the if-part in if-then statements.

-- by 会员 AlohaDJ (2011/8/10 1:37:05)

A unless B:   Not A --> B (You have to negate the claim in A to make it a sufficient condition).

Not A unless B: A --> B

AlohaDJ

Thks NN for the explanations.

My summary from this question:
1. A unless B: A ->B (after UNLESS is a necessary condition)
2. To / in order to represents the if-part in if-then statements.

sdcar2010

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.