Combining Texts

You have chosen 'Rules for the Direction of the Mind' by René Descartes, 'Certain Physical Essays' by Robert Boyle and 'A Powers Theory of Modality' by Jonathan D. Jacobs

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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