You have chosen 'Précis of 'Ruling Passions'' by Simon Blackburn, 'Fourfold Root of Princ of Sufficient Reason' by Arthur Schopenhauer and 'Causation and the Flow of Energy' by David Fair
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |