Combining Texts

You have chosen 'On Duties ('De Officiis')' by M. Tullius Cicero, 'The Analysis of Matter' by Bertrand Russell and 'The Nature of Possibility' by David M. Armstrong

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