You have chosen 'Db (ideas)' by PG, 'Frege's Theory of Numbers' by Charles Parsons and 'Investigations into Logical Deduction' by Gerhard Gentzen
start again | choose another area for these texts | all the ideas for this combination of textsAll the ideas for Natural Theory, or select a subheading: |
A. | Speculations on Nature | |
B. | Natural Kinds | |
C. | Causation | |
D. | Laws of Nature |