When he was twelve, Hugh wrote letters to Albert Einstein raising the question whether it was something random or unifying that held the universe together . Einstein was kind enough to answer. In a letter dated June 11, 1943, he wrote,
"Dear Hugh: There is no such thing like an irresistible force and immovable body. But there seems to be a very stubborn boy who has forced his way victoriously through strange difficulties created by himself for this purpose. Sincerely yours, A. Einstein" .