Let’s talk about fairness, the word no one can quite pin down. It echoes in high-school hallways and campus quads, in editorial pages and judicial opinions — wherever people have something to say about college admissions. But what is fairness, really? Ask the applicant, for whom an admissions decision from a selective college arrives like the last judgment. An acceptance rewards years of studying deep into the night, excelling in extracurriculars, and shelling out for those SAT-prep courses. And rejection is condemnation.