How do you distinguish a real supernatural occurrence from, say, a mistake, a dream, or a human deception?
In the case of the occult, like witchcraft or necromancy, one way to examine it would be to experiment with it. That, of course, is forbidden, but the prohibition itself is evidence of the danger.
But the testimony of those who did experiment with those things, is also evidence. People I trust have told me of their experiences.
My father told me of his experience with a Ouija board. The lensed item (I don't know what it's called) moved on its own to answer his question. It scared him and he burned it.
A late pastor of mine told of a visit paid to him and his wife by an invisible intruder. They were young and lived in a basement of the house they were building. They had just gone to bed and they both heard heavy foot falls coming down the stairs, across the floor to the foot of their bed. The foot falls stopped, and they heard the laugh of a woman they knew who had recently passed, as if she were standing right there. They were terrified, of course, and they began to claim the blood of Jesus. And, of course, they knew it wasn't her ghost.
Once I gave a lesson on Samuel's ghost, which, of course, wasn't really Samuel's ghost. A couple I knew, and whose kids I went to school with, told me of their experience seeing the ghost of their son who had died in an automobile accident. He stood at the foot of their bed and assured them he was doing okay. (With good reason, they feared his eternal state.) They believed my lesson about Samuel, that the ghost was an imposter, but asked if I thought God would sometimes send someone back to comfort those in grief.
I simply told them that I was talking about Samuel, and that God would not yield to a witch, but that God is also very merciful. They've both passed on now. So they know whether or not it was the ghost of their son that they saw. If I were to be less tactful, I would have simply answered them, I don't believe so.
My dad was alone in his experience. But I believe him. Those in the two ghost stories were not alone, and unless they were having the same dream (or nightmare) there is the mouth of two or more witnesses, describing the same event.
In the cases of the so-called alien abductions, over four million people, just in the U.S. are describing terrifying experiences, not mere sightings, with common elements. And in the book and the movie, there are those featured who ended the torments by calling upon the name of the Lord.
Testimonies are valid evidence. I believe very few ghost stories. And I tend to believe Christians, especially those who, like the author of the book, are reputable.
(On the last, the FFF was once graced by an "actual" ghost hunter. Let's say he wasn't too happy that we could see his videos were clearly faked.)
Don't you wish film was a thing during the Exodus?