What you seem to be implying, id, is that you:
1) Have a dream, that you recall pretty clearly after waking, and could document immediately
2) Some time afterwards, _after_ you’ve already remembered the dream, you experience a waking event…which you realize, as it’s happening, matches the earlier dream
If that’s the case, I’m stumped–if I believe you, I’m amazed. I’ve certainly had the "in the moment" type of deja vu before, when you think "I’ve seen this before, and I think it was in a dream", but that’s different.
I’ve read many explanations for that latter type, along the lines of what’s been mentioned here–where there’s basically a "stutter" somewhere in the visual processing area of your brain, so that instead of the seemingly continuous stream of information, like a movie, you’re getting a whole bunch of distinct moments, more like a really fast slideshow. (Before anyone objects, I _know_ a movie is still just a series of still images, but experientially, it’s different, and that’s my point.) In normal deja vu, for each "slide", your brain says "Wait, I’ve seen that before", but the "before" is just a millisecond before, and you end up moving through a few seconds of an experience with that weird familiarity.
The former type, though, would be impressive, but you’d have to be pretty rigorous about proving that it’s true before I’d really buy it. I’m a natural skeptic, and I’d run through all the explanations around probability, etc., that advil offered before I’d really be convinced.
Are you really talking about early dreams, with very specific details, that you’ve documented _before_ the fact, or just a real conviction, _after_ the fact, that "I’ve dreamed this somewhere before"?
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