You have chosen 'Theory of Science (4 vols)' by Bernard Bolzano, 'On the Conservation of Force' by Hermann von Helmholtz and 'Formal and Transcendental Logic' by Edmund Husserl
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 |