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'Posthumous notes', 'The Principles of Mathematics' and 'The Unimportance of Identity'
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5 ideas
27. Natural Reality / A. Classical Physics / 1. Mechanics / a. Explaining movement
14168

Occupying a place and change are prior to motion, so motion is just occupying places at continuous times [Russell]

27. Natural Reality / A. Classical Physics / 1. Mechanics / c. Forces
14171

Force is supposed to cause acceleration, but acceleration is a mathematical fiction [Russell]

27. Natural Reality / C. SpaceTime / 1. Space / c. Points in space
14160

Space is the extension of 'point', and aggregates of points seem necessary for geometry [Russell]

27. Natural Reality / C. SpaceTime / 3. SpaceTime
14156

Mathematicians don't distinguish between instants of time and points on a line [Russell]

27. Natural Reality / D. Cosmology / 1. Cosmology
14169

The 'universe' can mean what exists now, what always has or will exist [Russell]
