You have chosen 'Frege versus Cantor and Dedekind' by William W. Tait, 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell and 'Category Mistakes' by Ofra Magidor
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 |