Combining Texts

You have chosen 'Principle of Life and Plastic Natures' by Gottfried Leibniz, 'On the True Doctrine (Against Christians)' by Celsus and 'Defining 'Intrinsic' (with Rae Langton)' by David Lewis

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All the ideas for Theory of Logic, or select a subheading:
      A. Overview of Logic
      B. Logical Consequence
      C. Ontology of Logic
      D. Assumptions for Logic
      E. Structures of Logic
      F. Referring in Logic
      G. Quantification
      H. Proof Systems
      I. Semantics of Logic
      J. Model Theory in Logic
      K. Features of Logics
      L. Paradox