You have chosen 'Intro to 'Philosophical Essays'' by Richard Cartwright, 'On the Source of Necessity' by Ross P. Cameron and 'The Sign of Four' by Arthur Conan Doyle
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |