Combining Texts

You have chosen 'works (all lost)' by Aristippus the elder, 'Naming and Necessity lectures' by Saul A. Kripke and 'De Ente et Essentia (Being and Essence)' by Thomas Aquinas

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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