You have chosen 'Principles of Theoretical Logic' by Hilbert,D/Ackermann,W, 'Mental Models' by P. Johnson-Laird and 'Two Problems of Epistemology' by Karl Popper
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Objects, or select a subheading: |
| A. | Existence of Objects | |
| B. | Unity of Objects | |
| C. | Structure of Objects | |
| D. | Essence of Objects | |
| E. | Objects over Time | |
| F. | Identity among Objects |