Combining Texts

You have chosen 'Cosmic Apprentice' by Dorion Sagan, 'Fourfold Root of Princ of Sufficient Reason' by Arthur Schopenhauer and 'On the Genealogy of Morals' by Friedrich Nietzsche

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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