Watching the sun travelling across the sky from sunrise to sunset is a typical observation of operational phenomena.
People say that the sun is travelling across the sky which is, from a functional standpoint, false. People think that they are standing still on a place and that the sun is moving.
A functionalist approach explains that this phenomenon is basically the consequence of the rotation of earth, which happens roughly at 1,000 miles per hour, but people think that they are standing still, and the sun is surrounding the earth.Â