You have chosen 'Function and Concept' by Gottlob Frege, 'Completeness of Axioms of Logic' by Kurt Gdel and 'Launching Points to the Realm of the Mind' by Porphyry
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 |