the festival theme, tribal truths and new wisdoms, set the agenda for a weekend of uncovering our flawed tribal beliefs and proposing fresh new solutions to pressing issues across politics, philosophy, art and science. speakers included neuroscientist steven pinker, philosopher and author rebecca goldstein, banksy's former agent steve lazarides, novelist deborah levy, turner prize architect paloma strelitz, and long-time hawking collaborator roger penrose. the music line-up included pop duo bloom twins and singer-songwriter rae morris, while ahir shah and olga koch headlined the comedy programme.