You have chosen 'Must We Believe in Set Theory?' by George Boolos, 'Interview with Baggini and Stangroom' by Ray Monk and 'On 'Physics'' by Albert of Saxony
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |