Bret Victor, “Inventing on Principle”. The talk becomes interesting around 10 minutes in and utterly fascinating at about 20 minutes, when he demos a debugger you’ll drool over. “That might be what it’s like to implement an algorithm without a blindfold on,” he says. But the principle he wishes to live by is about all creation, not just writing software. At around 30 minutes in, he gets into animation. No, really, watch this. “When I see ideas dying, it hurts. I see a tragedy. To me it feels like a moral wrong.” (He gets to what Larry Tesler has in common with Elizabeth Cady Stanton, which just killed me.)

Bio: Bret Victor invents tools that enable people to understand and create. He has designed experimental UI concepts at Apple, interactive data graphics for Al Gore, and musical instruments at Alesis.

His website is

Via @chrisdesalvo.