Deja Vu is a feeling that what is happening had happened before but you cannot quite remember when or how. Besides deja vu, I have also experienced something unusual when I was very little such as dreaming what WILL HAPPEN and it really happened.
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It is indeed a very good answer. But I have another guess, that it could be some special ability of brain that have not yet been used or developed by us humans. Since we do not actually fully understands brain yet!
Nicholas, I LOVE the concept of an undeveloped special ability of the brain. When you think of what we do when we're dreaming, it's an amazing untapped resource.(My husband can actually guess the number in my head from 1 to 100 in a quiet setting.)
Science can't even proves something that don't exist. Literally.
How nice to have a "best answer". Thank you Nicholas. This was a fun question :) Cheers, Billie