Combining Texts

You have chosen 'What is so bad about Contradictions?' by Graham Priest, 'The Doctrine of Necessity Examined' by Charles Sanders Peirce and 'Eight Theories of Ethics' by Gordon Graham

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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