You have chosen 'Intro to G��del's Theorems' by Peter Smith, 'The Nature and Communication of Substance' by Gottfried Leibniz and 'Substance and Essence in Aristotle' by Charlotte Witt
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 |