You have chosen 'Principles of Philosophy' by René Descartes, 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo and 'Realism, Mathematics and Modality' by Hartry Field
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 |