Combining Texts

You have chosen 'What is an Idea?' by Gottfried Leibniz, 'A Theory of Universals' by David M. Armstrong and 'The Ego and Its Own' by Max Stirner

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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