Combining Texts

You have chosen 'A Discourse on Method' by René Descartes, 'On the Nature of Mathematical Reasoning' by Henri Poincar and 'On Nature Itself (De Ipsa Natura)' by Gottfried Leibniz

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All the ideas for Mathematics, or select a subheading:
      A. Nature of Mathematics
      B. Foundations for Mathematics
      C. Sources of Mathematics