A fun little puzzle if you've not seen it before: You come across these bike tracks in the snow. Was the bike travelling to the left or the right? (I first saw a puzzle like this on Futility Closet)pic.twitter.com/gKnFupKCrU
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Seems to me that it's about the phase lag between the two curves
you're probably right .. i'm having trouble visualizing this one .. maybe i should get out more
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