Combining Texts

You have chosen 'Human Freedom and Divine choice' by Gottfried Leibniz, 'Whitehead and the Rise of Modern Logic' by Willard Quine and 'Symbolic Logic (with Langford)' by C.I. Lewis

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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