Combining Texts

You have chosen 'De modo distinguendi phaenomena' by Gottfried Leibniz, 'Principles of Nature and Grace based on Reason' by Gottfried Leibniz and 'Phenomenal and Perceptual Concepts' by David Papineau

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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