If you stand close to a birdcage and press your face against the wires, your perception of the bars will disappear and you will have an almost unobstructed view of the bird. If you turn your head to examine one wire of the cage closely, you will not be able to see the other wires. If your understanding of the cage is based on this myopic view, you may not understand why the bird doesn’t just go around the single wire and fly away. You might even assume that the bird liked or chose its place in the cage.
