You have chosen 'A Problem about Substitutional Quantification?st1=Saul A. Kripke' by , 'Principles of Theoretical Logic' by Hilbert,D/Ackermann,W and 'Phil of Mathematics and Natural Science' by Hermann Weyl
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 |