Combining Texts

You have chosen 'The Value of Science' by Henri Poincaré, 'Letters to Thomas Burnett' by Gottfried Leibniz and 'The Apology' by Plato

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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