You have chosen 'The Sign of Four' by Arthur Conan Doyle, 'Nonexistent Objects' by Terence Parsons and 'Launching Points to the Realm of the Mind' by Porphyry
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 |