Combining Texts

You have chosen 'The Evolution of Logic' by William D. Hart, 'The Blue and Brown Notebooks' by Ludwig Wittgenstein and 'Gdel's Proof' by E Nagel / JR Newman

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