You have chosen 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo, 'Maxims and Reflections' by Wolfgang von Goethe and 'The Logical Structure of the World (Aufbau)' by Rudolph Carnap
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Existence, or select a subheading: |
| A. | Nature of Existence | |
| B. | Change in Existence | |
| C. | Structure of Existence | |
| D. | Theories of Reality | |
| E. | Categories |