You have chosen 'Reference and Reflexivity' by John Perry, 'Of Organum or Ars Magna of Thinking' by Gottfried Leibniz and 'Dialogue on Things and Words' by Gottfried Leibniz
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |