Combining Texts

You have chosen 'What Numbers Are' by Nicholas P. White, 'English as a Formal Language' by Richard Montague and 'Ruling Passions' by Simon Blackburn

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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