Combining Texts

You have chosen 'The Actual and the Possible' by Alexander R. Pruss, 'A Thousand Small Sanities' by Adam Gopnik and 'Frege's Theory of Numbers' by Charles Parsons

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