然而，许多研究发现，感觉和思想并不一定能预测行为。

However many studies have found that feelings and thoughts don't necessarily predict behavior.

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实际上，经济学家使用不同的分析工具，来预测行为。

In fact, economists use various analytic tools to predict behavior.

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例如，Ruby习惯在预测行为的方法名后面加个问号“？”

For instance, Ruby has the habit of appending a question mark (?) to the name of a predicatelike method.

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