You have chosen 'On the Nature of Mathematical Reasoning' by Henri Poincaré, 'What is so bad about Contradictions?' by Graham Priest and 'The Boundary Stones of Thought' by Ian Rumfitt
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 |