Exorcism has been recorded through history,and yet it is a category no one can disprove or prove.Many things don't make sense science can prove,how could any person speak 20 languages?Then again you can do things like react to holy water as having the "demonized" placebo affect.Regarded that many exorcisms have been confused with mental Illnesses like schizophrenia,so it is based on assumption whether one is demonized or not.I honestly think demons are real,and we battle with them every day,though I doubt saying verses in the bible in Latin can somehow force a demon out of someone.Believe what you think is true as your mind is yours alone.