You have chosen 'The Sign of Four' by Arthur Conan Doyle, 'The Problem of the Essential Indexical' by John Perry and 'The Origin of the Species' by Charles Darwin
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 |