You have chosen 'On Duties ('De Officiis')' by M. Tullius Cicero, 'Letters to Varignon' by Gottfried Leibniz and 'Identity in Substances and True Propositions' by Gottfried Leibniz
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Knowledge Criteria, or select a subheading: |
| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |