There is a girl I know who did not know about Hurricane Katrina. She happens to be the girl I had to let go from the lab at the end of spring semester. One day the sink was clogged and I told her just to use the plunger (sitting on the shelf above the sink). She did not know where plunger was. When I pointed it out to her (thinking that she had just overlooked it) she held it quizzically for a moment and then stuck the wooden handle part in the drain opening. Turns out she had no idea what a plunger was. That's not the reason I fired her though.