Combining Texts

You have chosen 'Classical Cosmology (frags)' by T.M. Robinson, 'A Matter of Principle' by Ronald Dworkin and 'The Enneads' by Plotinus

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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