You have chosen 'Principia Mathematica' by Isaac Newton, 'Walking the Tightrope of Reason' by Robert Fogelin and 'Principles of Theoretical Logic' by Hilbert,D/Ackermann,W
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 |