Combining Texts

You have chosen 'Morality, Action, and Outcome' by Philippa Foot, 'New Foundations for Mathematical Logic' by Willard Quine and 'Inference to the Best Explanation (2nd)' by Peter Lipton

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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