Combining Texts

You have chosen 'In Defense of Essentialism' by L.A. Paul, 'Is Mathematics purely Linguistic?' by Bertrand Russell and 'On the Question of Absolute Undecidability' by Peter Koellner

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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