Combining Texts

You have chosen 'On Plural Reference and Set Theory' by Helen Cartwright, 'Logic and Epistemology of Causal Relations' by G.H. von Wright and 'Nominalism and Realism' by David M. Armstrong

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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