Re: Cheryl's Birthday

[Samuel Thibault <sthibault@debian.org>]

Geert Stappers, le mer. 16 juil. 2025 22:40:37 +0200, a ecrit:
> Oh, almost over: Cheryl's Birthday
> ( https://en.wikipedia.org/wiki/Cheryl's_Birthday )
> 
> 
> Text for that wiki page:
> 
>   Albert: I don't know when Cheryl's birthday is, but I know that Bernard doesn't know too.
>   Bernard: At first I don't know when Cheryl's birthday is, but I know now.
>   Albert: Then I also know when Cheryl's birthday is.
> 
> 
> 
> My question: Have you examples
> where expressing "I don't know" was part of the solution?

We have a joke for our first-year university students: 4 computer
scientists enter a bar. The barman asks "Everybody takes a beer, as
usual?" The first scientist says "I don't know". The second scientist
says "I don't know". The third says "I don't know". The fourth says "So,
yes indeed!".

Samuel