Combining Texts

You have chosen 'What is the Basis of Moral Obligation?' by H.A. Prichard, 'Anthropological Studies of Classification' by Roy Ellen and 'Axioms for the Part Relation' by Nicholas Rescher

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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