You have chosen 'Natural Kinds' by Willard Quine, 'Dialogue on human freedom and origin of evil' by Gottfried Leibniz and 'Ontology and the Vicious Circle Principle' by Charles Chihara
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 |