"Arthur Eddington ... was asked if it was really true that only three people in the world understood the theory, he said nothing. “Don’t be so modest, Eddington

"Arthur Eddington ... was asked if it was really true that only three people in the world understood the theory, he said nothing. “Don’t be so modest, Eddington!” his questioner said. “On the contrary,” Eddington replied. “I’m just wondering who the third might be.” The third person was https://en.wikipedia.org/wiki/Karl_Schwarzschild https://en.wikipedia.org/wiki/Karl_Schwarzschild .