来自《耶鲁大学开放课程：心理学导论 第10集 第10集》

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  On the other side is a person's age.
  另一面是人的年龄
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  You are a bartender and you want to make sure
  你是一个调酒师 你想确认
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  nobody under twenty-one drinks beer.
  没有一个低于二十一岁的在喝啤酒
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  Which cards do you turn over?
  你要翻哪张卡呢
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  Well, now it's easier but the logic is the same.
  现在虽然简单了但逻辑还是一样
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  It's a violation that there's "under twenty-one" on one side,
  当一面是21岁以下
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  "beer" on the other side,
  另一面是啤酒时就算违规
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  so you need to check the "under twenty-one" here
  所以你需要看一下这张21岁以下
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  and you need to check the "beer" here.
  再看一下这张啤酒
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  And when you make these logical problems more ecologically
  当你把逻辑问题变的更符合生态学时
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  valid they turn out to be much easier.
  就会简单得多
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  Okay.
  好了