Combining Texts

You have chosen 'The Universe as We Find It' by John Heil, 'The Boundary Stones of Thought' by Ian Rumfitt and 'The Theory of Logical Types' by Bertrand Russell

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All the ideas for Existence, or select a subheading:
      A. Nature of Existence
      B. Change in Existence
      C. Structure of Existence
      D. Theories of Reality
      E. Categories