Personally, I am able to hear voices. I hear when people think loudly around me and I most certainly hear the thoughts of those I care about. I know that what I hear is real by the many confirmation that I receive from those around me. Like hearing something said before the person speaks or hearing someone answer my question before I ask it or even communicating on a regular basis with friends who also have a heightened psychic awareness. So whats the difference then between me and the guy even I would deem "crazy"?
I'v been considering a degree in parapsychology so that I can study this for myself. Currently my hypothesis is that the have not gained a level of psychic understanding and control that would allow them to manage these voices and find their own. My observations have also brought me to believe that these individual are possibly to open to external psychic influences with no strong hold over their own mind and possibly being energetically booted out of their own bodies at times. Of course I would need to study people diagnosed with these two things quite a bit more as well as the many phenomenons I know to exist in real time such as telepathy and outer body experiences.
Other than evidence, what is it that makes an individuals experience real and another's an illusion?
Just something to think about for a while.