Sasha: Hey Dad! Are you a thirteen double-bracket Y?
Me: [aware that the best answer to a schoolyard question is usually ‘yes’] Yes!
Sasha: Are you a tom thirteen double-bracket Y?
Sasha: HA HA you’re a GIRL! Because tomboys are GIRLS!
Me: [thinks for a minute] You’re all a bunch of one-slash-one backwards-three R one bracket fives!
Clio: [writes on a piece of A4 paper] We are not! This is what the cool kids at school do!