Combining Texts

You have chosen 'Naming and Necessity lectures' by Saul A. Kripke, 'Counterpart theory and Quant. Modal Logic' by David Lewis and 'The Concept of Truth for Formalized Languages' by Alfred Tarski

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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