Combining Texts

You have chosen 'Must We Believe in Set Theory?' by George Boolos, 'On the Nature of Truth and Falsehood' by Bertrand Russell and 'Abstract of 'The Fourfold Root'' by Arthur Schopenhauer

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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