You have chosen 'The Aim and Structure of Physical Theory' by Pierre Duhem, 'Function and Concept' by Gottlob Frege and 'Pref to new 'Materialist Theory'' by David M. Armstrong
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 |