Combining Texts

You have chosen 'On the Nature of Mathematical Reasoning' by Henri Poincaré, 'The Theory of Objects' by Alexius Meinong and 'A Discourse on Method' by Ren Descartes

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