The image projected on the screen in the front of the classroom is Magritte's painting of a pipe, including the words, "Ceci n'est pas une pipe." (1) I ask the students to each briefly make a guess why they think Magritte wrote that, since the painting is obviously a pipe. Some volunteers share their guesses with the class. One student nails it. "It's not a pipe; it's a drawing of a pipe!"