Combining Texts

You have chosen 'Space, Time and Deity (2 vols)' by Samuel Alexander, 'Letters to Frege' by Bertrand Russell and 'Boole calculus and the Concept script' by Gottlob Frege

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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