Combining Texts

You have chosen 'On What Grounds What' by Jonathan Schaffer, 'On the Concept of Number' by David Hilbert and 'A Completeness Theorem in Modal Logic' by Saul A. Kripke

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All the ideas for Thought, or select a subheading:
      A. Modes of Thought
      B. Mechanics of Thought
      C. Content
      D. Concepts
      E. Abstraction