> By contrast, arithmetic is intentionally and exhaustively taught, yet most adults cannot perform it. The adults that can perform it practice it regularly. Wo

> By contrast, arithmetic is intentionally and exhaustively taught, yet most adults cannot perform it. The adults that can perform it practice it regularly. Would those same children that can talk continue to know how to do it if they were exposed to it briefly and then never given the opportunity to do it again? The social aspect of talking (understanding context, etc) requires a lot of practice, and regular exercising of it (just like arithmetic..)