You have chosen 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo, 'The Nature and Communication of Substance' by Gottfried Leibniz and 'The Central Questions of Philosophy' by A.J. Ayer
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Thought, or select a subheading: |
| A. | Modes of Thought | |
| B. | Mechanics of Thought | |
| C. | Content | |
| D. | Concepts | |
| E. | Abstraction |