You have chosen 'On the Principles of Indiscernibles' by Gottfried Leibniz, 'Set Theory and related topics (2nd ed)' by Seymour Lipschutz and 'New system of communication of substances' by Gottfried Leibniz
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 |