You have chosen 'Mathematics and Indispensibility' by Elliott Sober, 'Groundwork of the Metaphysic of Morals' by Immanuel Kant and 'Remarks on the Foundations of Mathematics' by Ludwig Wittgenstein
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |