Why a grand, unified theory of artificial intelligence may be a pipe dream

A computer scientist and a psychology professor analyze Entropica — the artificial intelligence system that's been getting major buzz in the blogosphere. Quick version: It's a good idea, but it underestimates the complexity of the real world. Sure, you could create an AI that can play chess, but that same bot won't necessarily have the skills it needs to also be capable of understanding grammar and sentence structure.