You have chosen 'Meaning and the Moral Sciences' by Hilary Putnam, 'On Duties ('De Officiis')' by M. Tullius Cicero and 'Must We Believe in Set Theory?' by George Boolos
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 |