I'm reminded of a set of experiments in which rats were placed in cages and provided with levers that would dispense food under varying circumstances.
1) The lever never dispenses food; the rat learns not to press the lever.
2) The lever dispenses food every time it is pressed; the rat learns to press the lever when it is hungry.
3) The lever randomly dispenses food when it is pressed; the rat goes crazy and pushes the lever like mad because it never knows when it will get food and when it won't.
Don't be rat 3.
