You have chosen 'Boole calculus and the Concept script' by Gottlob Frege, 'There are no ordinary things' by Peter Unger and 'Aristotle's Theory of Substance' by Michael V. Wedin
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 |