I believe ghost sightings are real - but caused by visual system trying to map inconclusive/limited information to something it already has a pattern for, and o

I believe ghost sightings are real - but caused by visual system trying to map inconclusive/limited information to something it already has a pattern for, and once a pattern (no matter how absurd) is found, it latches onto it. AFAIK what we "percieve" of the world is anyway a hallucination produces by our brain based on sensory input. And particular conditions can mess this up briefly. I've seen things twice that weren't there and realized what was going on only when got closer. First was when in the middle of the night I saw through a half open door my son (1 y at the time) walking in a room - I entered the room, and realized it was not plausible he could have been where I saw him a second a go. I backtracked what I saw and realized there was play carpet with road patterning on the floor, plus miscellanious kids stuff on the background. It was nearly pitch black. From my pov the scene mapped to my son in my visual system, and then it maintained this pattern just long enough for me to "see him walking". Second was when I during a normal day observed what only could be two crows fighting or mating on a small tree. I got close. Really close. Then it suddenly 'stopped' being two crows and I realized it was just a black plastic bag fluttering in the wind. I have no idea how to teach people of the fragility of our cognition in a way that would not involve a pathology as you had - realizing fragility of psyche is real similarly as death is real - but I feel realizing this would make people more emphatic towards all sorts of problems our fellow humans have.