You have chosen 'The Sign of Four' by Arthur Conan Doyle, 'Sources of Knowledge of Mathematics' by Gottlob Frege and 'Reply to First Objections' 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 |