Combining Texts

You have chosen 'Individuals without Sortals' by M.R. Ayers, 'Events and Semantic Architecture' by Paul M. Pietroski and 'On Body and Force, Against the Cartesians' by Gottfried Leibniz

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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