You have chosen 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo, 'De arcanus motus' by Gottfried Leibniz and 'On the Basis of Morality' by Arthur Schopenhauer
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
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