You have chosen 'The Essence of Reference' by Mark Sainsbury, 'Reflections on Knowledge, Truth and Ideas' by Gottfried Leibniz and 'The Concept of Logical Consequence' by Alfred Tarski
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |