Combining Texts

You have chosen 'Idealism: a critical survey' by A.C. Ewing, 'The Logical Syntax of Language' by Rudolph Carnap and 'Letters to Lelong' 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