Combining Texts

You have chosen 'On Sense and Reference' by Gottlob Frege, 'Criterion of Validity in Reasoning' by Charles Sanders Peirce and 'What are Sets and What are they For?' by Oliver,A/Smiley,T

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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