Combining Texts

You have chosen 'New System and Explanation of New System' by Gottfried Leibniz, 'Two letters on mind' by Ren Descartes and 'The Unimportance of Identity' by Derek Parfit

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