Combining Texts

You have chosen 'Aristotle and Descartes on Matter' by Gottfried Leibniz, 'Introduction to Mathematical Philosophy' by Bertrand Russell and 'The Concept of Truth for Formalized Languages' by Alfred Tarski

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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