You have chosen 'New Foundations for Mathematical Logic' by Willard Quine, 'The Identity of Indiscernibles' by Max Black and 'Fact, Fiction and Forecast (4th ed)' by Nelson Goodman
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |