You have chosen 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo, 'Recent Aesthetics in England and America' by Roger Scruton and 'Modal Logic' by Max J. Cresswell
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 |