Combining Texts

You have chosen 'New System and Explanation of New System' by Gottfried Leibniz, 'Is Justified True Belief Knowledge?' by Edmund L. Gettier and 'Pref to new 'Materialist Theory'' by David M. Armstrong

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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