Combining Texts

You have chosen 'Apriority and Existence' by Stephen Yablo, 'There are no ordinary things' by Peter Unger and 'The Methods of Ethics (7th edn)' by Henry Sidgwick

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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