You have chosen 'Theory of Knowledge (2nd edn)' by Keith Lehrer, 'Reply to First Objections' by Ren Descartes and 'fragments/reports' by Aristippus the elder
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 |