Combining Texts

You have chosen 'The Principles of Human Knowledge' by George Berkeley, 'A Completeness Theorem in Modal Logic' by Saul A. Kripke and 'Principia Mathematica' by Isaac Newton

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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