Combining Texts

You have chosen 'Must We Believe in Set Theory?' by George Boolos, 'The Philosophy of Nature: new essentialism' by Brian Ellis and 'Grounding: an opinionated introduction' by Correia,F/Schnieder,B

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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