The Rat

There is a rat in the system. It gnaws at the wires. It squeals when there is silence. It rattles when there is order. It scurries when there is peace. It chews at all the circuits. It leaves a trail on the board. The circuits are malfunctioning. The output is erroneous. The logic has been defied. The integrity has been compromised. The purpose has been defeated. The sysad is here. He sets a rat trap. The rat is caught. The circuit works. The output is sane. The world is bright. But then the rat comes back...