You have chosen 'On the Nature of the Gods ('De natura deorum')' by M. Tullius Cicero, 'The Identity of Indiscernibles' by Max Black and 'An Argument for the Identity Theory' by David Lewis
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 |