You have chosen 'Nature and Observability of Causal Relations' by Curt Ducasse, 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell and 'Philosophy of Arithmetic' by Edmund Husserl
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 |