Combining Texts

You have chosen 'Counting and the Natural Numbers' by Jeffrey H. Sicha, 'The Justification of Deduction' by Michael Dummett and 'Of the First Principles of Government' by David Hume

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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