If the past present and future are all the same and there can't be two of me at once, than who was I from one second ago? Was I a different person yesterday? Will I be a different person in one second from now?
This theory is completely contradictory and isn't even einstein's theory, its just a simplified dumber version of it. Also it's a theory, which means it actually isn't real until proven true... kind of like reincarnation.