Combining Texts

You have chosen 'Introduction to 'Language Truth and Logic'' by A.J. Ayer, 'Centring' by Anon (Cent) and 'Liberalism and the Limits of Justice' by Michael J. Sandel

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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