Both students were among “typical” applicants used as norms to train application readers like myself. And their different credentials yet remarkably close rankings illustrate the challenges, the ambiguities and the agenda of admissions at a major public research university in a post-affirmative-action world.

WHILE teaching ethics at the University of San Francisco, I signed on as an “external reader” at Berkeley for the fall 2011 admissions cycle. I was one of about 70 outside readers — some high school counselors, some private admissions consultants — who helped rank the nearly 53,000 applications that year, giving each about eight minutes of attention. An applicant scoring a 4 or 5 was probably going to be disappointed; a 3 might be deferred to a January entry; students with a 1, 2 or 2.5 went to the top of the pile, but that didn’t mean they were in. Berkeley might accept 21 percent of freshman applicants over all but only 12 percent in engineering.

My job was to help sort the pool.

We were to assess each piece of information — grades, courses, standardized test scores, activities, leadership potential and character — in an additive fashion, looking for ways to advance the student to the next level, as opposed to counting any factor as a negative.

External readers are only the first read. Every one of our applications was scored by an experienced lead reader before being passed on to an inner committee of admissions officers for the selection phase. My new position required two days of intensive training at the Berkeley Alumni House as well as eight three-hour norming sessions. There, we practiced ranking under the supervision of lead readers and admissions officers to ensure our decisions conformed to the criteria outlined by the admissions office, with the intent of giving applicants as close to equal treatment as possible.

The process, however, turned out very differently.

In principle, a broader examination of candidates is a great idea; some might say it is an ethical imperative to look at the “bigger picture” of an applicant’s life, as our mission was described. Considering the bigger picture has aided Berkeley’s pursuit of diversity after Proposition 209, which in 1996 amended California’s constitution to prohibit consideration of race, ethnicity or gender in admissions to public institutions. In Fisher v. the University of Texas, the Supreme Court, too, endorsed race-neutral processes aimed at promoting educational diversity and, on throwing the case back to lower courts, challenged public institutions to justify race as a factor in the holistic process.