Combining Texts

You have chosen 'Letters to Antoine Arnauld' by Gottfried Leibniz, 'The Nature of Existence vol.2' by J.M.E. McTaggart and 'On Aristotle's Metaphysics Book 2' by Alexander

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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