Combining Texts

You have chosen 'Writing the Book of the World' by Theodore Sider, 'Remarks on the definition and nature of mathematics' by Haskell B. Curry and 'On the analysis of moral judgements' by A.J. Ayer

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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