You have chosen 'The Strangest Man' by Graham Farmelo, 'On the Concept of Number' by David Hilbert and 'Letter to the Editor about Bayle' 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 |