You have chosen 'Concerning the Author' by Charles Sanders Peirce, 'Abstract of 'The Fourfold Root'' by Arthur Schopenhauer and 'True in Theory, but not in Practice' by Immanuel Kant
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 |