Combining Texts

You have chosen 'Classical Cosmology (frags)' by T.M. Robinson, 'Outline of a System of Utilitarianism' by J.J.C. Smart and 'Constructibility and Mathematical Existence' by Charles Chihara

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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