You have chosen 'On the Philosophy of Logic' by Jennifer Fisher, 'On the Conservation of Force' by Hermann von Helmholtz and 'Letter to Mersenne' by Ren Descartes
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 |