求助OG12 CR95

mia113

求助 OG12 CR95
95. Although parapsychology is often considered a pseudoscience, it is in fact a genuine scientific enterprise, for it
uses scientific methods such as controlled experiments and statistical tests of clearly stated hypotheses to
examine the questions it raises.
The conclusion above is properly drawn if which of the following is assumed?
(C) Any enterprise that does not use controlled experiments and statistical tests is not genuine science.
(D) Any field of study that employs scientific methods is a genuine scientific enterprise.
答案是D, 当时通过取非得出的答案·
排除C 是因为觉得   不用CE和ST 不是真科学    不能推出 用了CE和ST  就是真科学 就排除了 （感觉这个逻辑思维好像有点问题 不知道对不对）
后来对C取非后是：企业不用CE和ST是真科学 好像有点消弱了原文· 因为原文是 因为用了scientific methods(比方说CE和ET，所以它是真科学
不知道C到底是错在哪了，求助··

InfiniteAlex

Any enterprise that does not use controlled experiments and statistical tests is not genuine science.
不等于
All enterprise that use controlled experiments and statistical tests is genuine science.

比如：
任何不能被5整除的数一定不以5结尾。
不等于
所有能被5整除的数都以5结尾。（这句话显然错了，因为还有以0结尾的数能被5整除）

naoyixue

个人认为还是尊重og的思路

ethancjj

请问就是C选项缩小了范围的意思吗？
当时也是觉得这样所以把C排除了，可是OG后面的答案解释却说的是 因为这是irrelevant 所以才错，所以OG的意思是如果写成
Any enterprise that does not use scientific methods is not genuine science.
那么，根据OG的解释，这样也是错的。

请问我的理解正确吗 ？？ 求各位大神解释。

AlohaDJ

Noted with many thanks!!

sdcar2010

NN, could you plz help clarify whether negation must be needed here?

You ever mentioned that the word IF is used in Sufficient assumption prompts rather than in Necessary assumption ones. So here is a sufficient assumption question. For Sufficient assumption quetions, is Negation necessary in general?

Thks a lot for your COOL explanations!

-- by 会员 AlohaDJ (2011/8/4 22:49:20)

Good catch. I missed that part. For sufficient assumption, negation method is not required because not all necessary assumptions are sufficient assumption at the same time.

AlohaDJ

NN, could you plz help clarify whether negation must be needed here?

You ever mentioned that the word IF is used in Sufficient assumption prompts rather than in Necessary assumption ones. So here is a sufficient assumption question. For Sufficient assumption quetions, is Negation necessary in general?

Thks a lot for your COOL explanations!

mia113

Another thing is: think in English and write in English. Translation between Chinese and English is a waste of time, especially when sitting for the GMAT real test.

-- by 会员 sdcar2010 (2011/7/25 21:35:19)

Got it``I will adopt your suggestion.
However, I still have some doubts after reading some articles about the 真命题 否命题。
I deem that 否命题 is 不用真科学方法 是 假科学 which is almost the same as your answer.

sdcar2010

Thank you very much Sdcar
你的意思是说 就算没用CE和ST  也是science. 其实是增加了science包括的范围。 不会消弱 用了 科学方法（其中包括ce和st）是真科学 这个main conclusion 么？

-- by 会员 mia113 (2011/7/25 21:34:41)

Exactly.

sdcar2010

Another thing is: think in English and write in English. Translation between Chinese and English is a waste of time, especially when sitting for the GMAT real test.