You have chosen 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo, 'Sources of Knowledge of Mathematics' by Gottlob Frege and 'Proof of an External World' by G.E. Moore
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Science, or select a subheading: |
| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |