You have chosen 'Reply to 'Rorarius' 2nd ed' by Gottfried Leibniz, 'The Sceptical Chemist' by Robert Boyle and 'The philosophical basis of intuitionist logic' by Michael Dummett
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |