You have chosen 'An Argument for the Identity Theory' by David Lewis, 'Substitutional Classes and Relations' by Bertrand Russell and 'On Concept and Object' by Gottlob Frege
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Modality, or select a subheading: |
| A. | Necessity | |
| B. | Possibility | |
| C. | Sources of Modality | |
| D. | Knowledge of Modality | |
| E. | Possible worlds |