You have chosen 'Elements of Geometry' by Euclid, 'Among the Dead Cities' by A.C. Grayling and 'The Concept of Truth for Formalized Languages' by Alfred Tarski
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 |