Reply to #27
If there was only one incorrect answer, then 11 would know that there was one, and the 12th wouldn't know about any and would guess, and they would all be released the next morning.
Since they weren't released, those who knew about only one guessed about their own, and the next morning everyone was free.
About the Pear - you can't eat it: Aunt Grunya hanged herself)))
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