DSM-5 Has Been Described as Functioning Like a Light Switch

DSM-5 has been described as functioning like a light switch, which can be on or off. In other words, one either does or does not qualify for a personality disorder diagnosis. Some theorists suggest that degree of symptoms, not symptom absence or presence, is more important and similar to a:

A) flashlight, running on batteries.
B) dimmer switch, with the light adjustable from all the way off to all the way on.
C) candle, which may be blown out at any time.
D) capacitor, which builds up a charge slowly then discharges it all at once.