ABSTRACT
Seventy-five years ago, in April 1920, two of the leading astronomers of the first half of the twentieth century argued over the Scale of the Universe. In April 1995, in the same auditorium, two of the leading astronomers of the second half of the twentieth century argued over the Distance Scale to Gamma Ray Bursts. The text of the presented lectures and arguments are re-created in the following papers. It is hoped that these papers will stand as educational tools for those wishing to know the logic behind the arguments of the great gamma-ray burst controversy. These papers may also provide a clue as to how scientists think.