Learning the oral language of the culture into which one has been born is a stunning intellectual achievement, of incredible complexity. It involves fine degrees of perceptual discrimination. It depends upon abstract levels of transfer and generalization being continually made. It demands that incredible amounts be stored in memory for instant retrieval. It necessitates high degrees of automaticity of very complex processes. Despite this complexity, as a learning enterprise, it is almost universally successful, extremely rapid, usually effortless, painless, and furthermore, it’s extremely durable. ―BC