Combining Texts

You have chosen 'A Future for Presentism' by Craig Bourne, 'Regressive Method for Premises in Mathematics' by Bertrand Russell and 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell

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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