Combining Texts

You have chosen 'On the Nature of the Universe' by Lucretius, 'The Elm and the Expert' by Jerry A. Fodor and 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell

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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