GMAT 逻辑分析题 (21)

AlohaDJ

Thks NN for这道经典题目。

If A ->B (A is a condition but not necessarily a sufficient condition leading to B) is true, then its contrapositive(逆否命题) 'No B ->No A' is true, while its negation(否命题) 'No A ->No B' is not true.
The reason why the negation(否命题) is false is that other possibilities leading to B are overlooked.

clumsy123

en, what i mean is that if the statement is true that comparing oneself to others is the ONLY way leading to self-belittling and belittling others, will the argument be logical and sound?

-- by 会员 clumsy123 (2011/8/8 23:04:15)

Yes, then the flaw is gone.

-- by 会员 sdcar2010 (2011/8/8 23:40:46)

got it! thx sdNN!

AlohaDJ

Thks NN for这道经典题目。

If A ->B (A is a condition but not necessarily a sufficient condition leading to B) is true, then its contrapositive(逆否命题) 'No B ->No A' is true, while its negation(否命题) 'No A ->No B' is not true.
The reason why the negation(否命题) is false is that other possibilities leading to B are overlooked.

-- by 会员 AlohaDJ (2011/8/9 0:44:53)

X:In order to reduce the amount of plastic in landfills, legislatures should impose a ban on the use of plastics for packaging goods.
Y:Impossible Plastic packaging is necessary for public safety.Consumers will lose all of the safety features that plastic offers, chiefly tamper-resistant closures and shatterproof bottles.

Which of the following best describes the weak point in Y's response to X's proposal?

A. Y ignores the possibility that packaging goods in materials other than plastic might provide the same safety features that packaging in plastic offers.
B. The economic disadvantages of using plastics as a means of packaging goods are not taken into consideration.
C. Y attempts to shift the blame for the large amount of plastic in landfills from the users of plastic packaging to the legislators.
D. Y does not consider the concern of some manufacturers that safety features spoil package appearances.
E. Y wrongly assumes that X defends the interests of the manufacturers rather than the interests of the consumers.

OA: A.

Y's response to X's proposal depends on the assumption that if plastic packaging is safe, Non-plastic packaging is not safe.This reasoning is flawed as per what is mentioned in the quotes above. Choice A right points out the weakness of the flawed reasoning.

birbird11

单纯觉得这道题目内容有喜感，真贴近生活

单调唱

So, those students who normally refrain from comparing themselves to others at www.chasedream.com will most likely to have self-respect and respect others.
结论就有问题，不能说因为compare产生某些现象。就说不compare，就不会产生某种现象，可能有他因。

livebelieve

三句话只看前两句