You have chosen 'On the Question of Absolute Undecidability' by Peter Koellner, 'Analyzing Modality' by Michael Jubien and 'Criterion of Validity in Reasoning' by Charles Sanders Peirce
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |