 Why is perceptual learning philosophically significant? One reason is that it says something about the very nature of perception—that perception is more complex than it might seem from the first-person point of view. Specifically, the fact that perceptual learning occurs means that the causes of perceptual states are not just the objects in our immediate environment, as it seems at first glance. Rather, given the reality of perceptual learning, there is a long causal history to our perceptions that involves prior perception. When the expert wine-taster tastes the Cabernet Sauvignon, for example, that glass of wine alone is not the sole cause of her perceptual state. Rather, the cause of her perceptual state includes prior wines and prior perceptions of those wines. One way to put this is to say that perception is more than the immediate inputs into our senses. It is tied to our prior experiences.