You have chosen 'Identity in Substances and True Propositions' by Gottfried Leibniz, 'On Eternal and Immutable Morality' by Ralph Cudworth and 'What is Logic?' by Ian Hacking
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 |