Combining Texts

You have chosen 'Letters to Des Bosses' by Gottfried Leibniz, 'Essay Conc Human Understanding (2nd Ed)' by John Locke and 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell

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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