Um... I don't get how that was a really a fail. If he doesn't like feedback, then so what? It's more down to, y'know, opinion than failing. And if it's because he got feedback and oscillations mixed up, then who really cares? Maybe if he'd ever professed to being some kind of expert in the matter in the past and then got them confused, then I could understand it, but as it is... He hasn't.
