Alex Bellos poses one of the great puzzle 'paradoxes' of all time (well, actually a set of them) in his Guardian column today. I don't doubt he'll offer his usual lucid explanation later on... but also don't doubt that sparks will fly in the comments section... bring it on!:
https://www.theguardian.com/science/2019/nov/18/can-you-solve-it-the-two-child-problem
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