The Case Against Reality

As we go about our daily lives, we tend to assume that our perceptions-sights, sounds, textures, tastes-are an accurate portrayal of the real world. Sure, when we stop and think about it-or when we find ourselves fooled by a perceptual illusion-we realize with a jolt that what we perceive is never the world directly, but rather our brain's best guess at what that world is like, a kind of internal simulation of an external reality.