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scienceFeb 26, 202254:28pending

4219 信念:意外绞刑悖论

思考盒子

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在审讯中一位囚徒被法官判处死刑。判决如下:“你下周将会被处决,但哪天处决对你来说是一个惊喜。”囚徒因此作出如下推理:“假如处决日是周日,那么在周六夜晚降临后,我将提前知道我周日会被处决,那样的话处决就不再是惊喜,所以周日我不会被处决。排除了周日之后,如果周五夜晚降临后我还没被处决,则我将提前知道我周六会被处决,所以我周六也不会被处决。以此类推。因此,处决是不会发生的。”

然而,这个囚徒的愉快心情保持到了星期二。他从美梦中醒来,被押往刑场——对他来说非常意外。



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4219 信念:意外绞刑悖论

思考盒子

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