Combining Texts

You have chosen 'Lectures on the History of Philosophy' by Georg W.F.Hegel, 'Principles of Philosophy' by Ren Descartes and 'The iterative conception of Set' by George Boolos

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