Combining Texts

You have chosen 'Logic (Encyclopedia I)' by Georg W.F.Hegel, 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell and 'Counterparts and Identity' by Robert C. Stalnaker

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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