You have chosen 'Boole calculus and the Concept script' by Gottlob Frege, 'The Right and the Good' by W. David Ross and 'The Philosophy of Leibniz' by Bertrand Russell
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 |