You have chosen 'Armstrong on combinatorial possibility' by David Lewis, 'On the Conservation of Force' by Hermann von Helmholtz and 'Why Propositions cannot be concrete' by Alvin Plantinga
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 |