New York’s mayor, Bill de Blasio, like so many others who call themselves “progressive,” is gung-ho to solve social problems. In fact, he is currently on a crusade to solve an educational problem that doesn’t exist, even though there are plenty of other educational problems that definitely do exist.

The non-existent problem is the use of tests to determine who gets admitted to the city’s three most outstanding public high schools — Stuyvesant, Bronx Science and Brooklyn Tech. These admissions tests have been used for generations, and the students in these schools have had spectacular achievements for generations.