You have chosen 'Frege's Theory of Numbers' by Charles Parsons, 'New System and Explanation of New System' by Gottfried Leibniz and 'On the Plurality of Worlds' by David Lewis
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
| G. | Biology |