Combining Texts

You have chosen 'The Common-Sense View of Reality' by Stephen S. Colvin, 'Paradoxes of the Infinite' by Bernard Bolzano and 'A New Kind of Science' by Stephen Wolfram

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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