You have chosen 'On Plural Reference and Set Theory' by Helen Cartwright, 'Opus Maius (major works)' by Roger Bacon and 'Building Blocks of Mathematical Logic' by Moses Schnfinkel
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 |