Reality is just a matter of perception relative to the observer/participant. Things outside the observer's/participant's ability to perceive cannot affet them and therefore are not a part of the reality the observer/participant inhabits. Once all perception has terminated, the observer/participant has ceased to exist. The times when this occurres are; pre-preception, lapses in perception and post-perception. Or more commenly referred to as; pre-life, unconsciousness and death.