Combining Texts

You have chosen 'How the Laws of Physics Lie' by Nancy Cartwright, 'On the Nature of the Gods ('De natura deorum')' by M. Tullius Cicero and 'On the Source of Necessity' by Ross P. Cameron

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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