Combining Texts

You have chosen 'The History of the Jews' by Paul Johnson, 'Letters to Remond de Montmort' by Gottfried Leibniz and 'Elucidation of some points in E.Schrder' by Gottlob Frege

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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