Combining Texts

You have chosen 'Letter to G.H. Schaller' by Baruch de Spinoza, 'Nonexistent Objects' by Terence Parsons and 'Remarks on the definition and nature of mathematics' by Haskell B. Curry

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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