You have chosen 'In Defense of Essentialism' by L.A. Paul, 'Armstrong on combinatorial possibility' by David Lewis and 'What are Sets and What are they For?' by Oliver,A/Smiley,T
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 |