The element, the lack of boundaries, the familiar sets of rules of behavior can lose relevance or disappear completely as new interests take priority. Such a shift/change in reference points can lead to a lack of childhood knowledge. As previous normal behaviors and standards fade, caution and basic intelligence may also fade. It is not unusual to hear of people who have had near-death experiences being tricked, deceived, or involved in unpleasant incidents. Once they can begin to integrate what has happened to them, usually intelligence