Combining Texts

You have chosen 'Rationality' by Gilbert Harman, 'Letters to Leibniz' by Jacques Lenfant and 'An Analysis of Knowledge and Valuation' by C.I. Lewis

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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