You have chosen 'Summa totius logicae' by William of Ockham, 'How to Define Theoretical Terms' by David Lewis and 'The Boundary Stones of Thought' by Ian Rumfitt
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |