Combining Texts

You have chosen 'Changes in Events and Changes in Things' by Arthur N. Prior, 'An Axiomatization of Set Theory' by John von Neumann and 'Truth (2nd edn)' by Paul Horwich

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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