You have chosen 'To be is to be the value of a variable..' by George Boolos, 'Introduction of 'Essence of Christianity'' by Ludwig Feuerbach and 'Rules for the Direction of the Mind' by Ren Descartes
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 |