Critics of NFL’s Jaxson Dart concussion checks are missing the science behind it

Jaxson Dart thinks that being diagnosed with only one concussion during his five NFL concussion evaluations guarantees that he has sustained limited damage to his brain. Giants fans who are angry that Dart was removed from Sunday’s fourth quarter on the goal line feel that Dart had not taken a severe enough hit to warrant an evaluation. They are both wrong. The NFL’s arbitrary enforcement and lack of consistent accountability with their concussion policies warrants scrutiny. But it’s important not to let the public discourse about concussions descend into the unhelpful gray area, where people like Giants offensive coordinator Tim Kelly can say that Dart returning from a concussion in...