Combining Texts

You have chosen 'Defining 'Intrinsic' (with Rae Langton)' by David Lewis, 'On the Foundations of Logic and Arithmetic' by David Hilbert and 'Possible Worlds' 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