I experience Deja Vu somewhat often, and one scientific explanation is that it's just the brain going through your memories and misfiring, sort of like dreaming.. And.. I do think there might be a connection there to the dream world and this may be why some like yourself experience precognition.. I do think that perhaps the dreamstate is outside of our physical lineal time and that perhaps some people can go into the past and future so to speak and bring back information to the present, whether that is true or not I don't know.. but I have researched it a bit and I am very open to that possibility.. I dunno what Deju Vu is! But I wish I did! Good post. :)