If so are those souls moving from body to body or lifetime to lifetime in habiting different lives? What causes some to believe they've lived other lives and can detail their experiences? Children are closest to prior lives if such things exist. Is it harder to believe it or disbelieve it? Of course Karma/Reincarnation is based on iving multiple lives.
What if Deja View were really you remembering a past experience in a past life? How do you know it isn't?