Combining Texts

You have chosen 'The Roots of Reference' by Willard Quine, 'Building Blocks of Mathematical Logic' by Moses Schnfinkel and 'Nature and Observability of Causal Relations' by Curt Ducasse

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All the ideas for Modes of Existence, or select a subheading:
      A. Relations
      B. Properties
      C. Powers and Dispositions
      D. Universals
      E. Nominalism