Troy lies to team about concussions and doesn't consider getting his bell rung a concussion. There goes any argument that they players understand the risks. Troy just admitted how ignorant he is of the medicine. If he said he understood that each time was in fact a traumatic brain injury and that he is increasing the likelihood of permanent lifetime deficits when he lies to go back on the field, I would say he gets it and is hurting himself by choice, howerver stupidly. But he thinks it's no big deal and there he is simply wrong on the medical facts.
The rookie symposium and all league meeting should teach the truth about brain injuries.