Three Strings Walk Into A Bar

So three strings are walkin down a sidewalk when one of them spots a bar. They want to go in for a drink but there's a sign outside that says "NO STRINGS ALLOWED". So one of them goes in anyways, and he takes a seat up at the bar. He wants to order a drink but the bartender looks at him and asks "Hey are you a string?", and the string says "yea". The bartender says "Sorry but there's no strings allowed in here" so the first string walks back outside. The second string decides to give it a shot, and he tries to go in for a drink. Same thing happens, the bartender kicks him out, and he's forced to walk back outside. So the third string stops and thinks for a second, then he frays both his ends and ties himself in a knot. He walks inside and takes a seat at the bar. The bartender comes over and asks "Hey are you a string?" the string says "Nope I'm a frayed knot"