You have chosen 'An Axiomatization of Set Theory' by John von Neumann, '03: Book of Leviticus' by Anon (Lev) and 'Letters to the Lord Marquis of Newcastle' by Thomas Hobbes
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| A. | Modes of Thought | |
| B. | Mechanics of Thought | |
| C. | Content | |
| D. | Concepts | |
| E. | Abstraction |