Combining Texts

You have chosen 'Changes in Events and Changes in Things' by Arthur N. Prior, 'Discourse on Metaphysics' by Gottfried Leibniz and 'Science and Hypothesis' by Henri Poincar

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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