You have chosen 'Dialogue on human freedom and origin of evil' by Gottfried Leibniz, 'On the Algebra of Logic' by Charles Sanders Peirce and 'Opus Maius (major works)' by Roger Bacon
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 |