Combining Texts

You have chosen 'Some Puzzles of Ground' by Kit Fine, 'The World as Will and Idea' by Arthur Schopenhauer and 'Presidential Address of Am. Math. Soc' by Oswald Veblen

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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