Combining Texts

You have chosen '01: Book of Genesis' by Anon (Tor), 'Philosophies of Mathematics' by A.George / D.J.Velleman and 'Possible Worlds' by Robert C. Stalnaker

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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