Combining Texts

You have chosen 'Conceptual truth and metaphysical necessity' by Robert C. Stalnaker, 'Logic in Mathematics' by Gottlob Frege and 'Presidential Address of Am. Math. Soc' by Oswald Veblen

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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