You have chosen 'Possible Worlds' by David Lewis, 'The Rationality of Science' by W.H. Newton-Smith and 'Letters to Regius' by Ren Descartes
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 |