You have chosen 'Theory of Knowledge (2nd edn)' by Keith Lehrer, 'Rules for the Direction of the Mind' by Ren Descartes and 'Ontology and the Vicious Circle Principle' by Charles Chihara
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 |