两道OG逻辑，谢谢og-99,og-115

春天的花儿会开

115. Many people argue that tobacco advertising plays a crucial role in causing teen-agers to start or continue
smoking. In Norway, however, where there has been a ban on tobacco advertising since 1975, smoking is at
least as prevalent among teen-agers as it is in countries that do not ban such advertising.
Which of the following statements draws the most reliable conclusion from the information above?
(A) Tobacco advertising cannot be the only factor that affects the prevalence of smoking among teen-agers.
(B) Advertising does not play a role in causing teen-agers to start or continue smoking.
(C) Banning tobacco advertising does not reduce the consumption of tobacco.
(D) More teen-agers smoke if they are not exposed to tobacco advertising than if they are.
(E) Most teen-agers who smoked in 1975 did not stop when the ban on tobacco advertising was implemented.
the key：A
想请教B，自认为是个迷惑选项。对B取非原文不成立，所以B应该是个assumption，而假设的答案也应该可以作为归纳题的答案。我自己是这么认为的，望高手指点
Transnational cooperation among corporations is experiencing a model renaissance among United States firms,
even though projects undertaken by two or more corporations under a collaborative agreement are less
profitable than projects undertaken by a singly corporation . The advantage of transnational cooperation is that
such joint international projects may allow United States firms to win foreign contracts that they would not
otherwise be able to win.
99. Which of the following is information provided by the passage above?
(A) Transnational cooperation involves projects too big for a single corporation to handle.
(B) Transnational cooperation results in a pooling of resources leading to high-quality performance.
(C) Transnational cooperation has in the past been both more common and less common than it is now among
United States firms.
(D) Joint projects between United States and foreign corporation are not profitable enough to be worth
undertaking.
(E) Joint projects between United States and foreign corporations benefit only those who commission the
projects.
the key:C
请高手讲解一下，另外还有关于如何快速准确地排除其他选项。谢谢

happy_huan

99题，关键在renaissance
我不是高手，但我的经验是做多了就ok了
呵呵
在找到一个感觉比较接近正确选项的时候，就快速扫描余下的选项，可能对提速有帮助，不过总是比仔细看正确率要低些，所以多做题多积累经验十分重要

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多谢happy-huan mm指导，只是我一排除选项的时候就会把正确的选项排掉，真是惭愧啊

八戒

对B取非原文不成立，所以B应该是个assumption，

我觉得对B取非后，原文仍然成立的，并非是一个weaken.
原文中：Many people argue that tobacco advertising plays a crucial role in causing teen-agers to start or continue smoking.

Maybe there are many factors in causing teen-agers to start or continue smoking.
The tobacco advertising is likely to play a trivial role.If so , we can not conclude that tobacco advertising will exert the remarkable effect on causing teen-agers to start or continue smoking.

So , in my view, B is not assumption, but an irrelevant statement.

春天的花儿会开

多些八戒神仙的指点。刚刚考完T，只有不到一个月的时间准备G，所以现在的重点放在了OG的总结上面，不只对否。
此外，我在这两天的总结过程中发现虽然问的是conclusion，但是实际上就是再问assumption&inferrence.也就是说可以用取非的假设做法来做conclusion的题，不知这种感觉对否。曾经和一位斑竹讨论过这个问题，这位斑竹的回复是：assumption是支持的真子集，可是不是归纳的。您看呢？谢谢

八戒

I agree with what you said here.Actually, there are some correlation between conclusion and assumption.But,tell the truth ,I can not help you a lot.I just have preparied for cracking GMAT earlier than you , and then made more mistakes. I can not clearly answer this question.
      But it is obvious that OG is the most important  reference to GMAT.And you should put emphasie on it.If you have enough time , you can try LSAT.


      Let's shake hands and crack GMAT!

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谢谢八戒神仙，我们一起努力。

lifelover

再问115， 选项E是不是可以作为解释明显分歧（apparent discrepancy）的答案来用？

lawyer_1

不行，差很远。一是E没说是 这是Norway的情况。关键是 原文Norway是和别的国家比，E和自己以前比，所以解释不了矛盾。

kangdi

Why do we have to concerned about assumption and conclusion for this type of questions? Or why do we have to negate an answer? Does it help?