You have chosen 'The Problem of Empty Names' by Marga Reimer, 'Letters to Burcher De Volder' by Gottfried Leibniz and 'Building Blocks of Mathematical Logic' by Moses Schnfinkel
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 |