Combining Texts

You have chosen 'A World of States of Affairs' by David M. Armstrong, 'Without Immediate Justification' by Michael Williams and 'Title, Unity, Authenticity of the 'Categories'' by Michael Frede

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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