user: Mark puts his blue basketball in a wooden box and closes it. Mark doesn't know it, but this is a magical box, which changes colors of things that are left inside. After a few minutes, the basketball turns green. Mark looks at the box but cannot see what is happening inside. Before opening the box, Mark calls his friend to tell them that the color of the basketball is

assistant: Blue. Unaware of the magical properties of the box, Mark is confident that the basketball has remained the same color. He excitedly tells his friend about the blue basketball he has just put in the box, completely oblivious to the surprise that awaits him when he opens it.