You have chosen 'On the Question of Absolute Undecidability' by Peter Koellner, 'Mathematical Thought from Ancient to Modern Times' by Morris Kline and 'New system of communication of substances' 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 |