Combining Texts

You have chosen 'There are no ordinary things' by Peter Unger, 'Opus Maius (major works)' by Roger Bacon and 'The Epistemology of Essentialist Claims' by Alan McMichael

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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