You have chosen 'An Argument for the Identity Theory' by David Lewis, 'Substitutional Classes and Relations' by Bertrand Russell and 'Objections to 'Meditations' (Fifth)' by Pierre Gassendi
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 |