You have chosen 'Concerning the Author' by Charles Sanders Peirce, 'Sets, Aggregates and Numbers' by Palle Yourgrau and 'A Structural Account of Mathematics' by Charles Chihara
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
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