You have chosen 'Elements of Mathematical Logic' by Jan Lukasiewicz, 'Ontology and the Vicious Circle Principle' by Charles Chihara and 'The Structure of Science' by Ernest Nagel
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 |