As we have seen, he was concerned about the fundamental meaning of the theory from the time he as an undergraduate, and many of his important arguments had their basis at that time.
Nagu nägime, oli ta mures sisulist tähendust teooria alates hetkest, kui ta nii bakalaureuse-, ja paljud tema olulised argumendid olid nende põhjal kõnealusel ajal.