Combining Texts

You have chosen 'Science and Method' by Henri Poincaré, 'Writing the Book of the World' by Theodore Sider and 'What Required for Foundation for Maths?' by John Mayberry

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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