Combining Texts

You have chosen 'Against Coherence' by Erik J. Olsson, 'Categories, Classification, Cogn. Anthropology' by Roy Ellen and 'Mathematical Explanation' by Mark Steiner

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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