A string walks into a bar. “Excuse me,” he asks “can I please have a drink?” “Nope” replies the bartender “we don’t serve strings.” Upset at the racism the string asks a fellow at the bar to buy him a drink. Seeing this the bartender picks him up and throws him out of the bar. The string walks over to a curb rubs himself against it and ties himself in a knot, then walks back into the bar. “Excuse me, can I please have a drink?” “Aren’t you the string that was just here?” asks the bartender. “No” came the answer, “I’m a frayed knot.”