Combining Texts

You have chosen 'On What Grounds What' by Jonathan Schaffer, 'Model Theory for Modal Logic I' by Kit Fine and 'Substitutional Classes and Relations' by Bertrand Russell

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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