Lisp Scheme Part22 - 暇つぶし2ch

Lisp Scheme Part22 at TECH

93:デフォルトの名無しさん
08/05/24 16:29:17
んでもって解答
The Hatter said, in effect, that either the March Hare or the Dormouse stole it.
If the Hatter lied, then neither the March Hare nor the Dormouse stole it,
which means that the March Hare didn't steal it, hence was speaking the truth.
Therefore, if the Hatter lied, then the March Hare didn't lie,
so it is impossible that the Hatter and the March Hare both lied.
Therefore the Dormouse spoke the truth when he said that the Hatter and March Hare didn't both lie.
So we know that the Dormouse spoke the truth. But we are given that the Dormouse and the March Hare didn't both speak the truth.
Then, since the Dormouse did, the March Hare didn't.
This means that the March Hare lied, so his statement was false, which means that the March Hare stole the jam.

これから逆算するに

ウサギ「私は盗んでいない」
帽子屋「ウサギかヤマネのどちらかが盗みました」
ヤマネ「帽子屋とウサギの両方が嘘を言っていることはありえません」
ルール：必ず単独犯で、ウサギとヤマネの両方が真実を告げているということはありえない

だ
>>75が正しいかな

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