Remember that "tacking"* in sailboats (going upwind, using only the force of that wind) was held to be impossible, a violation of the laws of nature until peopl

Remember that "tacking"* in sailboats (going upwind, using only the force of that wind) was held to be impossible, a violation of the laws of nature until people actually witnessed it, too. Severe violations of our expectations don't always break the actual math of a physics model. *more properly said "beating to windward" https://en.wikipedia.org/wiki/Tacking_(sailing) https://en.wikipedia.org/wiki/Tacking_(sailing)