Combining Texts

You have chosen 'The Sign of Four' by Arthur Conan Doyle, 'An Axiomatization of Set Theory' by John von Neumann and 'Frege on Knowing the Third Realm' by Tyler Burge

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All the ideas for Reason, or select a subheading:
      A. Nature of Reason
      B. Laws of Thought
      C. Styles of Reason
      D. Definition
      E. Argument
      F. Fallacies