premise: Operation Epsilon was the codename of a program in which Allied forces near the end of World War II detained ten German scientists who were thought to have worked on Nazi Germany's nuclear program. The scientists were captured between May 1 and June 30, 1945, as part of the Allied Alsos Mission, mainly as part of its Operation Big sweep through southwestern Germany.
hypothesis: It only took two months for Allied forces to capture Nazi Germany's nuclear scientists.
reason: Given the context, it only took from the first of May until the end of June for the Allied forces to capture the Nazi scientists that worked on Germany's nuclear programs, which is only a two month period. I would guess the system had trouble with it because of the time reference I used rather than the specifics.