Combining Texts

You have chosen 'What Does It Take to Refer?st1=Kent Bach' by , 'Treatise of Human Nature, Appendix' by David Hume and 'Brain Bisection and Unity of Consciousness' by Thomas Nagel

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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