this post was submitted on 07 Oct 2023
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Dad Jokes
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For this joke to logically work, logicians must be weird people who always know whether they want a beer or not. Because if it happened that the first guy just hadn't made his mind up yet, then the third guy's conclusion could be wrong.
First guy knows he wants a beer, but doesn't know if the others do, so says he doesn't know if all three do. However, if he had not wanted a beer, he would have known that not all three wanted one, and therefore would have said no. Which means the second guy then knows that the first guy wants a beer, but does not know if the third does. So he says he doesn't know. That gives the third guy, who also wants a beer, with enough information to say that all three want a beer