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.
Habang kami ay may nakita, siya ay nag-aalala tungkol sa pangunahing mga kahulugan ng teorya mula sa oras na siya bilang isang undergraduate, at marami ng kanyang mahalagang arguments had kanilang batayan sa oras na iyon.