Combining Texts

You have chosen 'The Science of Knowing (Wissenschaftslehre) [1st ed]' by Johann Fichte, 'What is a Law of Nature?st2=David M. Armstrong' by and 'Counterfactual Dependence and Time's Arrow' by David Lewis

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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