Combining Texts

You have chosen 'Reply to Fourth Objections' by René Descartes, 'The Thesis that Mathematics is Logic' by Hilary Putnam and 'What do powers do when they are not manifested?' by Stathis Psillos

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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