prov:value
| - It is becoming obvious that Lenin's externality thesis permits (or could permit) the existence of several non-material things -- in addition to the above, such things as lines of force, mirages, optical illusions, the perspectival properties of bodies, vectors, tensors, scalars, co-ordinate systems, and so on -- all the while ruling out-of-court other seemingly material things (like, 'the mind'
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