You have chosen 'Elucidation of some points in E.Schröder' by Gottlob Frege, 'Symbolic Logic (with Langford)' by C.I. Lewis and 'Animal Rights and Wrongs' by Roger Scruton
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 |