You have chosen 'Set Theory and related topics (2nd ed)' by Seymour Lipschutz, 'What Required for Foundation for Maths?' by John Mayberry and 'Does Consciousness Exist?' by William James
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 |