Combining Texts

You have chosen 'On boundary numbers and domains of sets' by Ernst Zermelo, 'On 'Generation and Corruption'' by Albert of Saxony and 'On Divination ('De divinatione')' by M. Tullius Cicero

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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