You have chosen 'Foundations of Geometry' by David Hilbert, 'The Later Works (17 vols, ed Boydston)' by John Dewey and 'Aristotle and Descartes on Matter' by Gottfried Leibniz
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |