You have chosen 'Principles of Philosophy' by Ren�� Descartes, 'Freedom of the Will and concept of a person' by Harry G. Frankfurt and 'Change in View: Principles of Reasoning' by Gilbert Harman
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 |