Combining Texts

You have chosen 'Defining 'Intrinsic' (with Rae Langton)' by David Lewis, 'Boole calculus and the Concept script' by Gottlob Frege and 'The Nature of Mathematics' by Charles Sanders Peirce

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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