Combining Texts

You have chosen 'On Plural Reference and Set Theory' by Helen Cartwright, 'Thinking and Experience' by H.H. Price and 'Against the Ethicists (one book)' by Sextus Empiricus

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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