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If HN consisted entirely of this kind of thing, I would never get anything done.

You might want to dive into the physics of "sailing downwind faster than the wind"[0], then =)

[0] uh, just google it really

An example video of the Downwind Faster than the Wind Challeng (DWFTTW), with windspeed 0: https://www.youtube.com/watch?v=dgHBDESd38M