Our Knowledge of the External World

by: Bertrand Russell, read in 1962

22 What philosophy can do
73-75 Follow this example assuming brains-in-a-vat given visual access to the Mandelbrot set. From this it is clear that perspective space and private space don't intersect. Thus his intersecting-lines method of determining the "location" of the penny in perspective space fails. To wit: the #10 seahorse in the M-set as viewed differently by two observers does not have a "location" in the same space as the viewed images. (Then again, maybe it does.)
87-88 Definition of a "thing".
158-9 Suggests a definition for 'God': The set of all sets. Langan?
160 Difficulty with the definition of 'number'
161 Huh?

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©2005 Paul R. Martin, All rights reserved.