Combining Texts

You have chosen 'Approaches to Intentionality' by William Lyons, 'Boole calculus and the Concept script' by Gottlob Frege and 'Logic and Epistemology of Causal Relations' by G.H. von Wright

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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