You have chosen 'A Discourse on Method' by René Descartes, 'Investigations into Logical Deduction' by Gerhard Gentzen and 'Dialogue on human freedom and origin of evil' by Gottfried Leibniz
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 |