来自《耶鲁大学开放课程：博弈论 第3集 第3集》

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  So, for example,
  例如说
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  you might think Down is dominated,
  你们可能认为选下是个劣势策略
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  but if we look a bit carefully we see
  但仔细观察后你会发现
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  that Down actually does better than Up against Right,
  参与人II选右时 选下要比上更好
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  and Down does better than Middle against Left.
  参与人II选左 选下比选中更好
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  Similarly, we can see that Right is not dominated,
  类似的 我们也得出右也不是劣势策略
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  because it does better against Up, than does Left.
  因为参与人I选上时 选右比选左好
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  But Left isn't dominated because
  选左也不是劣势策略
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  it does better than middle, and so on and so forth.
  因为参与人I选中时左是最策略 以此类推
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  You can work through this game and you can check pretty quickly
  当你从头到尾 仔细分析过之后
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  that nothing is dominated.
  你会发现这里没有劣势策略
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  So if the only tool I taught you in this class was dominated strategies
  所以之前讲的 不要采用劣势策略