You have chosen 'Oldest System Prog. of German Idealism' by Georg W.F.Hegel, 'Introduction to Mathematical Logic' by Michal Walicki and 'What Numbers Are' by Nicholas P. White
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |