You have chosen 'A Discourse on Method' by René Descartes, 'On the Introduction of Transfinite Numbers' by John von Neumann and 'Presidential Address of Am. Math. Soc' by Oswald Veblen
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 |