Combining Texts

You have chosen 'Frege's Theory of Numbers' by Charles Parsons, 'Meaning and the Moral Sciences' by Hilary Putnam and 'Human Society in Ethics and Politics' 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