In a world where political correctness often seems to rule, taboos are plentiful. Thankfully, busting them is still an integral part of good comedy. But there’s still potential for embarrassing social mishaps with every attempt at edgy humour. So, to help provide some guidance as to what is and what isn’t appropriate, the NZ International Comedy Festival gathered together an elite team of stand-up comedians, sit-down mathematicians and Colenso BBDO digital folk to try and solve a riddle that has plagued mankind for centuries: when is it too soon to joke about something?