You have chosen 'Theory of Knowledge (2nd edn)' by Keith Lehrer, 'Ontology and Mathematical Truth' by Michael Jubien and 'Launching Points to the Realm of the Mind' by Porphyry
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 |