Regarding Danielle Allen’s June 23 Sunday Opinion commentary, “Improving colleges through data-mining”:

The problem with “geographic diversity” is that it discriminates against clusters of highly concentrated talent. This seems like a contradiction; brilliance should be spread almost uniformly. However, big, concentrated cities such as New York or Boston have more talent simply because more people live there. That leads to these big cities having special gifted and talented schools, which cluster talent and status together. If colleges “double-down” on geographic diversity in admissions, as Ms. Allen advocated, they will inevitably penalize students of such schools.

Jonathan Ha, New York