You have chosen 'The Evolution of Logic' by William D. Hart, 'The Approach to Metaphysics' by Charles Sanders Peirce and 'Frege's Concept of Numbers as Objects' by Crispin Wright
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 |