You have chosen 'Function and Concept' by Gottlob Frege, 'On the Syllogism IV' by Augustus De Morgan and 'The Later Works (17 vols, ed Boydston)' by John Dewey
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |