Found on the internet.
Sister blog of Physicists of the Caribbean in which I babble about non-astronomy stuff, because everyone needs a hobby
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The Logician's Swindle
What makes a puzzle annoying ? When is solving a problem rewarding, and when is finding out the answer just frustrating ? If we could answer...

LOL. Cat's too lazy to chase the ball. Or it's paralyzed and getting it's exercise;-D
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