A shoestring knot walks into a fancy bar and the bartender says “excuse me sir are you a knot?” The knot says why yes, yes I am. Bartender says we don’t serve knots here. Please leave!

Next day the exact same thing.

Day three the knot scruffs himself all up on the pavement until he’s frayed up. He walks back in and the bartender says “excuse me sir but aren’t you a knot?”

The shoestring says why no, I’m afraid not!