You have chosen 'Tusculan Disputations' by M. Tullius Cicero, 'Fourfold Root of Princ of Sufficient Reason' by Arthur Schopenhauer and 'Treatise on Quantity' by Peter John Olivi
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |