Combining Texts

You have chosen 'Three Varieties of Knowledge' by Donald Davidson, 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo and 'Counterfactual Dependence and Time's Arrow' by David Lewis

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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