You have chosen 'Counterpart theory and Quant. Modal Logic' by David Lewis, 'Critique of the Gotha Program' by Karl Marx and 'The Value of Science' by Henri Poincar
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 |