國王與預言家
在臨上刑場前,
國王對預言家說:「你不是很會預言嗎?你怎麼不能預言到你今天要被處死呢?我給你一個
機會,你可以預言一下今天我將如何處死你。你如果預言對了,我就讓你服毒死;否則,我
就絞死你。」
但是聰明的預言家的回答,使得國王無論如何也無法將他處死。
預言家答道:「選會被絞死。」
國王真要絞死他的話,那他預言正確,應該是服毒死而不是絞死,
而讓他服毒死的話,那預言錯誤,該被絞死,而非服毒,
這是無限邏輯陷阱,所以國王只能放過他,沒法殺他。
A King and A Prophesier
Before going to the execution ground,
A King tells a prophesier that "Aren't you good at prediction? Why you cannot predict that you will be killed today? I will give you a chance. You can predict about how you will be killed today. If your prediction is right, I will poison you; If your prediction is wrong, I will hang you."
But the smart prophesier replied an answer such that the king cannot kill him.
The prophesier said "I choose to be hanged."
If the king hang him, then his prediction is right, so he should be poisoned rather than to be hanged.
If the king poison him, then his prediction is wrong, so he should be hanged rather than to be poisoned.
It is an infinitely logical trap, so the king can only let him go but not kill him.
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