It's true that babies know more than psychologists believed a century ago. However, I doubt kids know as much as Alison Gopnik claims they do. For that matter, most adults are no great shakes in the logic department.
Many new parents nowadays find comfort in the newfound brilliance that their tiny, non-verbal children may demonstrate in laboratory settings. But what implications do these lab findings hold for the day-to-day experiences of babies and those who care for them?