Combining Texts

You have chosen 'A Mathematical Introduction to Logic (2nd)' by Herbert B. Enderton, 'The Tragic Sense of Life' by Miguel de Unamuno and 'Beginning Logic' by E.J. Lemmon

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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