Quote Originally Posted by denuseri View Post
Actually seeing these things is a form of measurement.
Not exactly. It's the first step, certainly, but contrary to popular belief, seeing is not always believing. There are some pretty good optical illusions on You Tube that demonstrate that very well.

Quote Originally Posted by denuseri View Post
If what's being seen is from some weird kind of quantum entanglement between so called potentially parallel universes (which as I understand the main related theory means it's not so much "parallel" as dimensions warped up inside the space in between our own on the Plank scale) ...then it makes sense that the phenomena isn't fully recordable via normal means.
While this is, of course, a possibility, there would have to be a way for us to record such interactions, since they are physically impinging upon our universe. If what we think we are seeing is actually there, then it can be recorded. It might be that this entanglement is interacting directly with our brains, and we don't have the means to record such interactions, but then how do you separate them from hallucinations?

Quote Originally Posted by denuseri View Post
Furthermore: If it's been happening through out human history...then one can conclude that:

A) It is just what people seem to think it is IE the supernatural etc (which also means our understanding of physics is still a lil off since it needs to include the study of such things in more than just a fringe way..
The supernatural is, by definition, above nature, and therefore not subject to the laws of physics as we know them. In which case, they do not impinge upon our universe and can be considered on a par with hallucinations, as mentioned above.

Quote Originally Posted by denuseri View Post
B) It's a naturally occurring phenomena of the physical world and we humans are categorically misinterpreting what we are seeing or hearing etc and we just haven't figured out a way to substantially "measure" events....(or the act of attempted measurement is changing the results just like it does in the famous split screen experiments).
Not an impossible situation, certainly, but the fact that people tend to see different things (unless "prompted" by the visions of another person) tends to put this kind of viewing back into the realm of hallucination. The brain sees what's familiar. Cultural differences in such viewings seem to confirm this.

Quote Originally Posted by denuseri View Post
C) It's a relatively uncommon yet natural occurring element of human experience to "see ghosts" or at least "think one has" on occasion.
This is the most likely explanation, as far as I've been able to determine. We have a natural tendency to see things that aren't really there. It's part of our survival mechanism. The best explanation for this I've heard is the story of two primitive humans on the plains. They see movement in the grass and one of them sees it as a lion and runs away. The other sees it as wind in the grass and stays. If it's only the wind, both are OK. If it's really a lion, the one who stayed is dead. We are descended from those who ran away.