You have chosen 'Introduction to Mathematical Logic' by Michal Walicki, 'The Condemnation of 1277' by Anon (Par) and 'Counting and the Natural Numbers' by Jeffrey H. Sicha
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| A. | Modes of Thought | |
| B. | Mechanics of Thought | |
| C. | Content | |
| D. | Concepts | |
| E. | Abstraction |