Deconstructing April Fool’s Day

Okay, I admit it – my previous blog post was published on April 1. The foundations of mathematics are not really under attack, not now. But they were once!

Here’s a famous puzzle: imagine a village barber, who cuts the hair of everyone who doesn’t cut their own hair. Sounds simple enough, but who cuts the barber’s hair?

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Dinosaur Dodger Tips and Strategy

I recently uploaded a game I call “Dinosaur Dodger“. It’s based on an interesting paradox I read about on this blog, by an economist who has authored a number of good books. The paradox is called the “Paradox of the Absent Minded Driver”. It goes like this : imagine a driver, driving home along a highway. They need to take the second exit to get off, but for some reason they can’t recall which exit they are at when they get to an exit.

The Absent Minded Driver paradox, and Dinosaur Didger, involve finding the best strategy to get home on this track
The Absent Minded Driver paradox, and Dinosaur Didger, involve finding the best strategy to get home on this track

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A Little Conundrum

Consider the sentence :

“Thsi sentence hsa three errors.”

The puzzle is to find the errors. Two of them are easy to find :

  • “Thsi” should read “This”,
  • “hsa” should read “has”,


but where’s the third error?

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