You have chosen 'How to Make our Ideas Clear' by Charles Sanders Peirce, 'Possible Worlds' by David Lewis and 'On Duties ('De Officiis')' by M. Tullius Cicero
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 |