You have chosen 'Natural Kinds' by Willard Quine, 'The Decline of the West' by Oswald Spengler and 'Causal Powers' by Harr,R./Madden,E.H.
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 |