Combining Texts

You have chosen 'The Establishment of Scientific Semantics' by Alfred Tarski, 'The Big Book of Concepts' by Gregory L. Murphy and 'The Essence of Reference' by Mark Sainsbury

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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