"In fact, there are many altered brain states where people may have a very vivid experience, or at least a vivid memory of their experience, precisely because they have impaired brain function. When you start dropping some of the higher brain functions out of the loop, like reality testing and things like that, … things can seem hyper-real. That could actually be a sign of brain dysfunction. It's similar to … somebody who is stoned thinking that they are really profound."