Combining Texts

You have chosen 'The Inference to the Best Explanation' by Gilbert Harman, 'On the Algebra of Logic' by Charles Sanders Peirce and 'Classical Cosmology (frags)' by T.M. Robinson

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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