You have chosen 'The Value of Science' by Henri Poincaré, 'On the Nature of the Gods ('De natura deorum')' by M. Tullius Cicero and 'Iteration Again' by George Boolos
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 |