Gen-X
Even though you botched the Deja Vu term, I am not looking to "win" an argument (as I generally perceive is your motivation) and I do consider the points you or others try to make (for or against my opinions). I didn't see why you said I "botched" the business with Deja Vu and Sam and You (I think it was another thread); but you and Sam are not the issue. Deja Vu is the issue. I'm not going to dismiss your opinions merely because you have clearly erred (as you suggested would be reason to dismiss my views, implying that I had botched something).

As far as accumulating information and spawning a background process, I think every average person exhibits the same subconscious thinking.
However, I know someone that is annoyingly socially "slow" and onlookers may perceive him to be retarded, yet I have noticed that if you mention a topic to him, he may respond several hours later (totally out of context for the present conversation) with a well thought out view, had it been presented at the former time. We might have joked that this person (or all in the conversation) was having a deja vu.

Since the information in the "vision endpoint" seems to come as a dream, the only way I can think of to monitor for deja vu is to keep track of dreams (log them) that might otherwise be dismissed. Then if the "real endpoint" occurs, they would tend to break this model of the brain trying to reconcile faulty information.