You have chosen 'Abstract of 'The Fourfold Root'' by Arthur Schopenhauer, 'An Essay in Aesthetics' by Roger Fry and 'Set Theory and related topics (2nd ed)' by Seymour Lipschutz
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |