Combining Texts

You have chosen 'The Thought: a Logical Enquiry' by Gottlob Frege, 'The Relation of Sense-Data to Physics' by Bertrand Russell and 'Of Civil Liberty' by David Hume

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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