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Ideas for 'works', 'Mathematics is Megethology' and 'Against the Physicists (two books)'

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27. Natural Reality / A. Classical Physics / 1. Mechanics / a. Explaining movement

22747	A man walking backwards on a forwards-moving ship is moving in a fixed place [Sext.Empiricus]
	Full Idea: If a ship moves forward and a man carries a rod backwards on it, then it is possible for an object to move without quitting its place.
	From: Sextus Empiricus (Against the Physicists (two books) [c.180], II.056)
	A reaction: [summary of a verbose paragraph] The point is that you cannot define movement as change of place (contrary to Russell's proposal!). The concept of a place seems to be relative. Walking on a treadmill.