For those of you still in the dark, René Magritte, a Beligan surrealist artist, painted La trahison des images (The Treachery Of Images) in the 1920s. Underneath a picture of a pipe he painted the words, Ceci n'est pas une pipe (This is not a pipe).
I became familiar with this work not through my extensive knowledge of Belgian art, but through the quite remarkable Gödel, Escher, Bach: an Eternal Golden Braid by Douglas Hofstadter. Why not order a copy now instead of reading blogs?