the scientific reason for deja vu is that your brain kinda misfires, and that gives you the feeling that youv seen this before, and thought this before, because you literally have...

i believe this to be false...i believe deja vu is a foretelling of the future, but the future can happen so quick...like 1/16 of a second from now is still the future...but i also believe that time is like a bunch of pictures, and what the future holds for us has already happened...