Combining Texts

You have chosen 'Changes in Events and Changes in Things' by Arthur N. Prior, 'The Architecture of Mathematics' by Nicholas Bourbaki and 'New system of communication of substances' by Gottfried Leibniz

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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