You have chosen 'Truth by Convention' by Willard Quine, 'Identity in Substances and True Propositions' by Gottfried Leibniz and 'Nominalism and Substitutional Quantifiers' by Ruth Barcan Marcus
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 |