Combining Texts

You have chosen 'Scientific Thought' by C.D. Broad, 'On the Law of War' by Francis de Vitoria and 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo

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