Combining Texts

You have chosen 'Notes on John Wilkins' by Gottfried Leibniz, 'Against the Physicists (two books)' by Sextus Empiricus and 'The Logical Basis of Metaphysics' by Michael Dummett

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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