You have chosen 'To be is to be the value of a variable..' by George Boolos, 'What is the Source of Knowledge of Modal Truths?' by E.J. Lowe and 'Philosophy of Natural Science' by Carl Hempel
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 |