Combining Texts

You have chosen 'works' by Bernard Williams, 'What do powers do when they are not manifested?' by Stathis Psillos and 'Rules for the Direction of the Mind' by Ren Descartes

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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