You have chosen 'Sources of Knowledge of Mathematics' by Gottlob Frege, 'Walking the Tightrope of Reason' by Robert Fogelin and 'The Theory of Objects' by Alexius Meinong
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
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