You have chosen 'Elucidation of some points in E.Schröder' by Gottlob Frege, 'Reply to First Objections' by René Descartes and 'Mathematical logic and theory of types' by Bertrand Russell
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Natural Theory, or select a subheading: |
| A. | Speculations on Nature | |
| B. | Natural Kinds | |
| C. | Causation | |
| D. | Laws of Nature |