You have chosen 'Sententia on 'De Caelo'' by Thomas Aquinas, 'The Middle Works (15 vols, ed Boydston)' by John Dewey and 'Knowledge, Possibility and Consciousness' by John Perry
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |