Combining Texts

You have chosen 'The Correspondence Theory of Truth' by D.J. O'Connor, 'Remarks on the forces of inorganic Nature' by J.R. Mayer and 'Two Chief World Systems' by Galileo Galilei

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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