You have chosen 'New system of communication of substances' by Gottfried Leibniz, 'On the Algebra of Logic' by Charles Sanders Peirce and 'Rechnungsmethoden (dissertation)' by Gottlob Frege
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 |