Combining Texts

You have chosen 'A Realistic Theory of Categories' by Roderick Chisholm, 'The Logical Syntax of Language' by Rudolph Carnap and 'Of Organum or Ars Magna of Thinking' by Gottfried Leibniz

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