Combining Texts

You have chosen 'Elusive Knowledge' by David Lewis, 'Metaphysical conseqs of principle of reason' by Gottfried Leibniz and 'An Axiomatization of Set Theory' by John von Neumann

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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