You have chosen 'On the Principles of Indiscernibles' by Gottfried Leibniz, 'The Big Book of Concepts' by Gregory L. Murphy and 'The Evolution of Logic' by William D. Hart
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 |