Combining Texts

You have chosen 'On the Principles of Indiscernibles' by Gottfried Leibniz, 'On the General Idea of Proof Theory' by Dag Prawitz and 'The Wealth of Nations' by Adam Smith

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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