Combining Texts

You have chosen 'How Things Might Have Been' by Penelope Mackie, 'Letter on Freedom' by Gottfried Leibniz and 'Counterpart theory and Quant. Modal Logic' by David Lewis

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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