You have chosen 'Proof of an External World' by G.E. Moore, 'Every Thing Must Go' by J Ladyman / D Ross and 'Il Saggiatore ('The Assayer')' by Galileo Galilei
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 |