Combining Texts

You have chosen 'On Duties ('De Officiis')' by M. Tullius Cicero, 'A General Principle to Explain Laws of Nature' by Gottfried Leibniz and 'That Politics may be reduced to a Science' by David Hume

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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