来自《耶鲁大学开放课程—哲学：死亡 第6集 第6集》

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  Normally, we think,
  通常来说 我们认为
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  if we imagine something,
  如果我们想象一些东西
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  it means it's possible.
  就意味这它是有可能的
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  Here I don't mean, of course, empirically possible.
  当然 我这里不是指在经验上可能
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  I could imagine a world with unicorns.
  我可以想象一个有独角兽的世界
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  It doesn't mean I think unicorns are physically possible.
  但并不代表我认为独角兽真的可能存在
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  All we mean here is logically possible.
  我这里所指的 都是指逻辑上的可能性
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  I can imagine a world with unicorns.
  我可以想象一个有独角兽的世界
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  It seems to follow that unicorns are logically possible.
  可以推测 独角兽在逻辑上是可能的
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  Imagination seems to be a guide to possibility;
  想象似乎是可能性的向导
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  but maybe not always.
  但也许并非总是
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  Maybe sometimes we can imagine something
  也许有时 我们可以想象