Combining Texts

You have chosen 'The Middle Works (15 vols, ed Boydston)' by John Dewey, 'Cardinality, Counting and Equinumerosity' by Richard G. Heck and 'Specimen inventorum' by Gottfried Leibniz

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All the ideas for Natural Theory, or select a subheading:
      A. Speculations on Nature
      B. Natural Kinds
      C. Causation
      D. Laws of Nature