请教Feifei--100中这句话如何取反?

mariewoo

Feifei--100

Zelda:
Dr. L, a research psychologist, has convincingly demonstrated that his
theory about the determinants of rat behavior generates consistently
accurate predictions about how rats will perform in a maze. On the
basis of this evidence, Dr. L. has claimed that his theory is
irrefutablely correct.

        

Anson: Then Dr.L is not a responsible psychologist,
Dr.L's evidence does not conclusively prove that his theory is correct.
Responsible psychologists always accept the possibility that new
evidence will show that their theories are incorrect.

        

Which one of the following can be properly inferred from Anson's argument?

        

A. Dr. L's evidence that his theory generates
consistently accurate predictions about how rats will perform in a maze
is inaccurate.

        

B. Psychologists who can derive consistently accurate
predictions about how rats will perform in a maze from their theories
cannot responsibly conclude that those theories cannot be disputed.

        

C. No matter how responsible psychologists are, they can never develop correct theoretical explainations.

        

D. Responsible psychologists do not make predictions about how rats will perform in a maze.

        

E. Psychologists who accept the possibility that new
evidence will show that their theories are incorrect are responsible
psychologists.

这题答案B,,NN说把C取反,发现跟Anson的说法同向,从而排除C选项
我的问题是,C这句话no matter how....,...can never....怎么取反呢?谢谢!

mariewoo

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