You have chosen 'Boole calculus and the Concept script' by Gottlob Frege, 'Introduction of 'Essence of Christianity'' by Ludwig Feuerbach and 'Daodejing (Tao Te Ching)' by Laozi (Lao Tzu)
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 |