You have chosen 'On Duties ('De Officiis')' by M. Tullius Cicero, 'A Puzzle Concerning Matter and Form' by Kit Fine and 'Letters to Foucher' by Gottfried Leibniz
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Knowledge Sources, or select a subheading: |
| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |