Combining Texts

You have chosen 'Letters to Antoine Arnauld' by René Descartes, 'Difficulties of Transfinite Numbers and Types' by Bertrand Russell and 'The Idea of the Brain' by Matthew Cobb

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