Combining Texts

You have chosen 'On the Question of Absolute Undecidability' by Peter Koellner, 'On Recent German Literature. Fragments' by Johann Gottfried Herder and 'Internal and External Reasons' by Bernard Williams

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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