Combining Texts

You have chosen 'Classical Cosmology (frags)' by T.M. Robinson, 'In Defence of Pure Reason' by Laurence Bonjour and 'The Actual and the Possible' by Alexander R. Pruss

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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