Combining Texts

You have chosen 'The Idea of Equality' by Bernard Williams, 'An Axiomatization of Set Theory' by John von Neumann and 'Boole calculus and the Concept script' by Gottlob Frege

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All the ideas for Nature of Minds, or select a subheading:
      A. Nature of Mind
      B. Features of Minds
      C. Capacities of Minds