You have chosen 'The Big Book of Concepts' by Gregory L. Murphy, 'Why the Universe Exists' by New Scientist writers and 'Lecture on Applicability of Mathematics' by Steven Weinberg
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 |