Combining Texts

You have chosen 'The Sayings of Confucius' by Confucius, 'To be is to be the value of a variable..' by George Boolos and 'Chomsky on himself' by Noam Chomsky

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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