Combining Texts

You have chosen 'Letter to the Editor about Bayle' by Gottfried Leibniz, 'Human Freedom and the Self' by Roderick Chisholm and 'Rules for the Direction of the Mind' by Ren Descartes

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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