Combining Texts

You have chosen 'Abstract of 'The Fourfold Root'' by Arthur Schopenhauer, 'The Structure of Empirical Knowledge' by Laurence Bonjour and 'There Are No Abstract Objects' by Cian Dorr

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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