You have chosen 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo, 'Beginning Logic' by E.J. Lemmon and 'Actualism and Thisness' by Robert Merrihew Adams
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 |