You have chosen 'Sources of Knowledge of Mathematics' by Gottlob Frege, 'The Concept of Logical Consequence' by Alfred Tarski and 'The Principles of Art' by R.G. Collingwood
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 |