Combining Texts

You have chosen 'The Spirit of the Laws (rev. 1757)' by Baron de Montesquieu, 'Letters to Samuel Masson' by Gottfried Leibniz and 'A Tour through Mathematical Logic' by Robert S. Wolf

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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