Combining Texts

You have chosen 'Letters to Antoine Arnauld' by René Descartes, 'The Runabout Inference Ticket' by Arthur N. Prior and 'On the Basis of Morality' by Arthur Schopenhauer

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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