You have chosen 'The Sign of Four' by Arthur Conan Doyle, 'Introduction to Russell's Theory of Types' by Willard Quine and 'Notes on Comments by Fardella' by Gottfried Leibniz
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Natural Theory, or select a subheading: |
| A. | Speculations on Nature | |
| B. | Natural Kinds | |
| C. | Causation | |
| D. | Laws of Nature |