Combining Texts

You have chosen 'Trees, Terms and Truth' by George Engelbretsen, 'Counting and the Natural Numbers' by Jeffrey H. Sicha and 'Liberalism and the Limits of Justice' by Michael J. Sandel

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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