You have chosen 'Reply to 'Rorarius' 2nd ed' by Gottfried Leibniz, 'An Analysis of Knowledge and Valuation' by C.I. Lewis and 'Boole calculus and the Concept script' by Gottlob Frege
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 |