You have chosen 'On the Principles of Indiscernibles' by Gottfried Leibniz, 'Fragments on My Philosophical Development' by Ludwig Feuerbach and 'Could There Be Unicorns?' by Michael Dummett
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
| G. | Biology |