Combining Texts

You have chosen 'Changes in Events and Changes in Things' by Arthur N. Prior, 'Noneism or Allism?' by David Lewis and 'The Source of Necessity' by Bob Hale

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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