Combining Texts

You have chosen 'The Sign of Four' by Arthur Conan Doyle, 'The Folly of Trying to Define Truth' by Donald Davidson and 'Treatise of Freewill' by Ralph Cudworth

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All the ideas for Formal Logic, or select a subheading:
      A. Syllogistic Logic
      B. Propositional Logic PL
      C. Predicate Calculus PC
      D. Modal Logic ML
      E. Nonclassical Logics
      F. Set Theory ST
      G. Formal Mereology