By the age of five to six, most children understand you can deceive people by showing one kind of overt behaviour and feeling something else.

大部分5至6岁的儿童懂得你可以通过显露一种表面的行为来骗人，而实际上想着另外的事情。

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However, the team found that eventually both methods of memory retrieval were as effective in the tasks, meaning that while sleep deprivation affects brain function it does not affect overt behaviour, as previously thought.

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Undoubtedly, the Obama Administration is too fastidious for such Cold War-style behaviour, but perhaps overt, democratic institution-building assistance is not too much to ask.

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