sentences:  An urban legend states that the sayings "Saved by the bell" and "Dead ringer" are both derived from the notion of having a rope attached to a bell outside the coffin that could alert people that the recently buried person is not yet deceased; these theories have been proven a hoax.Although greater public confidence in the medical profession and its ability to diagnose death accurately has seen a reduction in fear of premature burial after the early 20th century there have been periods of public alarm in recent decades after medical errors in diagnosing death were reported.Taphophobia may remain common in some parts of the world.