You have chosen 'On the Nature of the Gods ('De natura deorum')' by M. Tullius Cicero, 'The Foundations of Empirical Knowledge' by A.J. Ayer and 'Could There Be Unicorns?' by Michael Dummett
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 |