Combining Texts

You have chosen 'New System and Explanation of New System' by Gottfried Leibniz, 'Frege on Extensions from Concepts' by Tyler Burge and 'A Problem about Substitutional Quantification?' by Saul A. Kripke

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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