You have chosen 'Introduction to Russell's Theory of Types' by Willard Quine, 'Philosophy of Mathematics' by James Robert Brown and 'Guidebook to Wittgenstein's Tractatus' by Michael Morris
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |