[求助]大全-13-8

8.     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?

(A) If a field of study can conclusively answer the questions it raises, then it is a genuine science.

(B) Since parapsychology uses scientific methods, it will produce credible results.

(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.（D）

(E) Since parapsychology raises clearly statable questions, they can be tested in controlled experiments.

看了这题的C 选项，我想请教大家一个关于取非削弱的问题：若对C项取非，应该怎么取啊？谢谢！
1. Any enterprise that does not use controlled experiments and statistical tests is not genuine science.

2. Any enterprise that does not use controlled experiments and statistical tests is not genuine science.

3. Any enterprise that does not use controlled experiments and statistical tests is not genuine science.

P.S. 刚刚转战到逻辑区，没有找到gemj前辈的大全中GMAT目录下的提问连接汇总，不知有没有啊？(有看到weiyu的LSAT 部分的)

UP

按卡百利的解释对C取非就是Any enterprise that does not use controlled experiments and statistical tests is genuine science。这明显反对结论，这不就是假设吗？

有没有人可以解释一下？

Here is the correct way:

Any enterprise that employs controlled experiments and statistical tests is not a genuine science。

觉得本题的重心是genuine science & science method.

所以，包含这两个元素的选项一定是正确答案．

controlled experiments and statistical tests 只是一个举例而已．

meanwhile ,combine with 11OG.

c 是必要

d 是充分

原文是充分