You have chosen 'Notes on John Wilkins' by Gottfried Leibniz, 'Intrinsic and Extrinsic Properties' by Ross P. Cameron and 'An Axiomatization of Set Theory' by John von Neumann
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |