Combining Texts

You have chosen 'New System and Explanation of New System' by Gottfried Leibniz, 'Which Logic is the Right Logic?' by Leslie H. Tharp and 'Armstrong on combinatorial possibility' by David Lewis

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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