Ask a psychopath what he is supposed to do in a particular situation, and he can usually give you what non-psychopaths would regard as the correct answer.

如果询问一名精神病态者，在一个特殊的情况下他会做什么，那人总会给出一个让精神正常者认为正确的答案。

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If it's not correct, find out what the correct response is and ask the user for a question that would have distinguished the right answer from the wrong one.

如果不正确，就询问用户究竟是什么项，并要求用户提供一个可以区分正确答案和错误答案的问题。

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The first task is to find out what was the correct answer.

第一个任务是查明正确答案是什么。

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So, let's see what the correct answer is, Wakefield and it is, in fact, Wakefield, right, because there's an inverse relationship between how fast a particle is going and what its wavelength is.

所以，让我们来看看,正确的答案是什么，事实上，答案是，因为粒子运动的快慢,与它的波长之间是一个反比例关系。

麻省理工公开课 - 化学原理课程节选

It isn't always obvious what the correct answer is.

BBC: Could a new phonetic alphabet promote world peace?