Even if the admission process had no "error" as you call it, there would still be kids who fail. Future behavior and circumstances are not predictable or contro

Even if the admission process had no "error" as you call it, there would still be kids who fail. Future behavior and circumstances are not predictable or controllable to that extent, no matter how good the admissions process is. Regardless, the goal of admissions is not to pick the exact top students, but to create a solid class. That may involve taking some chances on kids who provide diversity or experience in areas other than pure academics. If those kids fail, it is not error, but intentional risk. Even the "best" (whatever that means) kid carries some risk, and may fail due to personal or incidental circumstances that could not have been known during the admissions process.