Combining Texts

You have chosen 'The Fixation of Belief' by Charles Sanders Peirce, 'On Duties ('De Officiis')' by M. Tullius Cicero and 'Sameness and Substance Renewed' by David Wiggins

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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