Combining Texts

You have chosen 'works' by Aristotle, 'On Nature Itself (De Ipsa Natura)' by Gottfried Leibniz and 'Frege's Theory of Numbers' by Charles Parsons

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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