Combining Texts

You have chosen 'The Inference to the Best Explanation' by Gilbert Harman, 'Title, Unity, Authenticity of the 'Categories'' by Michael Frede and 'De Legibus Naturae' by Richard Cumberland

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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