You have chosen 'The Theory of Transfinite Numbers' by George Cantor, 'On the Conservation of Force' by Hermann von Helmholtz and 'A Specimen of Discoveries' by Gottfried Leibniz
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 |