Combining Texts

You have chosen 'Why the Universe Exists' by New Scientist writers, 'What is an Emotion?' by William James and 'Against the Professors (six books)' by Sextus Empiricus

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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