You have chosen 'Nature and Observability of Causal Relations' by Curt Ducasse, 'A Mathematical Introduction to Logic (2nd)' by Herbert B. Enderton and 'On Concept and Object' by Gottlob Frege
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 |