You have chosen 'On the Nature of the Universe' by Lucretius, 'Letters to Fardella' by Gottfried Leibniz and 'On boundary numbers and domains of sets' by Ernst Zermelo
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |