You have chosen 'A Combinatorial Theory of Possibility' by David M. Armstrong, 'Logic in Mathematics' by Gottlob Frege and 'On Carnap's Views on Ontology' by Willard Quine
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |