Combining Texts

You have chosen 'The Origin of the Species' by Charles Darwin, 'The Foundations of Mathematics' by Frank P. Ramsey and 'On Sense and Reference' 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