The French painter Magritte, after painting a pipe, added the caption: "Ceci n'est pas une pipe."
He later explained that it would have been a lie to caption it as a pipe, since it was only a representation of one.
His famous painting has stimulated reflection on representations ... versus the thing represented, and has led to a variety of remediations of his initial work. Some are artistic, some humorous, and others provoke further thought. Here are a few of the more interesting.