Combining Texts

You have chosen 'A Combinatorial Theory of Possibility' by David M. Armstrong, 'The Boundary Stones of Thought' by Ian Rumfitt and 'Proof of an External World' by G.E. Moore

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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