Combining Texts

You have chosen 'Sententia on 'De Caelo'' by Thomas Aquinas, 'On Anger (Book 3)' by Seneca the Younger and 'Sources of Knowledge of Mathematics' by Gottlob Frege

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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