You have chosen 'Introduction to the Theory of Logic' by José L. Zalabardo, 'Tarski on Truth and Logical Consequence' by John Etchemendy and 'Letters to Frege' by Bertrand Russell
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 |