Combining Texts

You have chosen 'Counterpart theory and Quant. Modal Logic' by David Lewis, 'Commentary on 'Posterior Analytics' by Jonathan Barnes and 'Lives of Eminent Philosophers' by Diogenes Laertius

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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