You have chosen 'Principle Doctrines ('Kuriai Doxai') (frags)' by Epicurus, 'True in Theory, but not in Practice' by Immanuel Kant and 'My Philosophical Development' 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 |