Combining Texts

You have chosen 'Librium de interpretatione editio secunda' by Boethius, 'The Later Works (17 vols, ed Boydston)' by John Dewey and 'Morality, Action, and Outcome' by Philippa Foot

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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