Combining Texts

You have chosen 'Reply to Fourth Objections' by René Descartes, 'Intro to 'Creating the Kingdom of Ends'' by Christine M. Korsgaard and 'Dialogue on human freedom and origin of evil' 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