You have chosen 'Concerning the Author' by Charles Sanders Peirce, 'Of Organum or Ars Magna of Thinking' by Gottfried Leibniz and 'Reflections on Knowledge, Truth and Ideas' 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 |