You have chosen 'Frege's Theory of Numbers' by Charles Parsons, 'Rule Utilitarianism and Euthanasia' by Brad W. Hooker and 'New system of communication of substances' by Gottfried Leibniz
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |