The questions about inside or outside the brain. This is a distinguishing factor for Diagnosing DID and PTSD (which voices with this come in flashback memories of trauma) because they are the only disorders where the voices are inside the head. Professionals rule those out first and then they know they can work the medication route with the person to get rid of the voices that result from chemical imbalance. If DID and PTSD are ruled in the professional knows medication won't work on the voices and refers the person to a therapy professional.