Combining Texts

You have chosen 'A Completeness Theorem in Modal Logic' by Saul A. Kripke, 'Elements of Law and Justice' by Gottfried Leibniz and 'An Axiomatization of Set Theory' by John von Neumann

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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