OK, it was a trick question. I cleaned the spark plug before taking the picture.
Guy’s car was running rough and the check engine light was on. He went to Autozone for a code read and found a misfire, told him most common cause was plugs and wires. The clerk sold him spark plugs, a wire set, and a small tube of anti-seize. Guy goes home, installs the new plugs, packs the wire boots full of anti-seize, installs the wires, then wonders why the car runs worse than before.