You have chosen 'Investigations into Logical Deduction' by Gerhard Gentzen, 'What is Cantor's Continuum Problem?' by Kurt Gdel and 'Theory of Knowledge (2nd edn)' by Keith Lehrer
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 |