Combining Texts

You have chosen 'Review of Chihara 'Struct. Accnt of Maths'' by John P. Burgess, 'Introduction to Zermelo's 1930 paper' by Michael Hallett and 'Letters to William Molyneux' by John Locke

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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