You have chosen 'Abstract of 'The Fourfold Root'' by Arthur Schopenhauer, 'Remarks on the definition and nature of mathematics' by Haskell B. Curry and 'Summa quaestionum super Sententias' by Peter John Olivi
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |