Combining Texts

You have chosen 'A World of Propensities' by Karl Popper, 'A Slim Book about Narrow Content' by Gabriel M.A. Segal and 'Three Grades of Modal Involvement' by Willard Quine

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