Déjà vu is one of the strangest sensations I have ever felt, and it is also the most recurrent in my days. Déjà vu appears in front of me very often, spontaneously and unexpectedly, there are times in which I can have deja vu every day, in fact, a moment ago I had one, I took a break before continuing writing to do something, I sat down to write again and I had a Déjà vu. Maybe this will seem exaggerated and maybe you won't even believe me, but it's the truth, I don't need to lie either, heh heh.
As it is something so recurrent in my mind, the common could go unnoticed, that is, the moments where I feel the Déjà vu are not very relevant, it can happen to me walking, in a line to buy, although it is something that happens to me mostly when I'm playing or making music. The feeling of having already lived before something that is happening to you in the present is very crazy, before this fact always remained perplexed, even sometimes, when Déjà vu comes, I try to meditate a little more on it, on that feeling, try to turn it into a thought to see if I can know what will happen later, if I already lived this moment that I am generating now, then I could that some fraction of this strange event gives me a hint of the future; of course, this something hypothetical, I have tried but I have never managed to see the future.
I once saw a science program that tried to explain the phenomenon of Déjà vu in a logical way, it was several years ago, but I remember that one of the theories they formulated in that program was that Déjà vu was a neuronal failure caused by some error of evolution, which could have arisen in the era of homosapien. To be perfectly honest, I found this explanation to be bullshit ha,ha,ha, besides being boring, it is silly. I think that what we call "mistakes" or "failures" may be something that we simply do not understand, and we give the adjective that it was a mistake just because we cannot explain it.
As Albert Einstein said, "God does not play dice", the universe is not just throwing random arrows for reality to emerge, everything has a reason, and I believe that Déjà vu can be a connection between us and our counterparts in other timelines or parallel universes, such connections can arise depending on the person.