Ghosts don't exist. Existence is a dimensional term. Everything within these dimensions we observe is only partial, we have a limited, even if vast knowledge of these things. Our existence is only what we can put into words, academics...
Spirits if existent are on a further removed plain of existence than are most things that "exist". Like wise, the supposed existence of spirits, is that only a few of us with the abilities to see such things can even see spirits. Spirits and mediums for example.
Which brings into this the topic, really, essentially, this is a good example, perhaps. Where as it's not magic, if people like these mediums can really communicate with ghosts its probably in that brain of theirs, that we only use very little of, the lot of us...We don't use lots of our brain.
After all facts come from some sort of experience, or first hand observation, other wise you have theories.
The mind/ brain doesn't fully experience anything, we are limited. Most of us, all of us But, some of us have gifts.
Ghosts DONT EXIST. That doesn't mean that I don't believe in them and it doesn't mean that i don't believe there is a life after death.
The shocking stories of ghosts are usually evident when physical objects in this reality are moved, thrown across rooms, etc etc, to a non gifted...That's one of the few ways to get a non gifted to truly believe. It's consider a phenomenon when this happens...
I've seen and heard spirits when in a deeply sedated state, but still aware, likely experiencing a unique set of brain waves. Of course as you are fully once again aware as human, you can make excuses, explain things away. You can explain things, functioning as before, as a complete human being, brain waves and all. Where as near death/ out of body experiences are often the same and mysteriously sound like ghost experiences...
So I believe in ghosts, I believe that they exist, but they don't exist