Combining Texts

You have chosen 'Classical Cosmology (frags)' by T.M. Robinson, 'Letters to Mersenne' by Ren Descartes and 'Truth (2nd edn)' by Paul Horwich

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All the ideas for Science, or select a subheading:
      A. Basis of Science
      B. Scientific Theories
      C. Induction
      D. Explanation