You have chosen 'Natural Kinds' by Willard Quine, 'Three Grades of Modal Involvement' by Willard Quine and 'A World of States of Affairs' by David M. Armstrong
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |