You have chosen 'Popular Scientific Lectures' by Ernst Mach, 'Letters to Leibniz 1' by Isaac Newton and 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell
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 |