You have chosen 'Life of Pythagoras' by Iamblichus, 'Persistence, Change and Explanation' by Sally Haslanger and 'Mathematics and the Metaphysicians' by Bertrand Russell
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 |