Combining Texts

You have chosen 'Principles of Philosophy' by René Descartes, 'Causation and the Manifestation of Powers' by Alexander Bird and 'The Philosophy of the Inductive Sciences' by William Whewell

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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