You have chosen 'Introduction to Mathematical Logic' by Michal Walicki, 'Later Letters to Dedekind' by George Cantor and 'A Combinatorial Theory of Possibility' by David M. Armstrong
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |