来自《耶鲁大学开放课程：博弈论 第13集 第13集》

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  if Ryan the lion eats Alex the sheep.
  假如瑞恩真的吃了绵羊阿历克斯
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  The catch is, that if Ryan the lion eats Alex the sheep,
  那么它吃了阿历克斯的后果就是
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  then Ryan the lion will fall into a postprandial stupor, fall asleep,
  瑞恩吃完之后会犯困而睡着了
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  at which point the second largest lion whose name is Chris can eat Ryan.
  这样第二强壮的狮子克里斯就会吃掉瑞恩
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  Now notice Chris can never eat the sheep.
  记住克里斯不能吃绵羊
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  He can only ever eat the lion, the big lion,
  它只能吃掉领头狮子
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  and only then if the lion has eaten the sheep and falls asleep.
  而且只有当领头狮吃了羊睡着了才行
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  This is very strict.
  这没得商量
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  Lion society is very hierarchical like England.
  狮子社会就像英格兰一样等级分明
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  If, however, Ryan the lion eats Alex the sheep,
  但是如果瑞恩吃了阿历克斯睡着了
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  and is then eaten, falls asleep and is then eaten by Chris the lion,
  然后就会被克里斯吃掉
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  then and only then he will fall into a stupor
  克里斯吃完后也会睡着