At an art museum
A man is looking at a blank canvas.
Nothing is drawn on the canvas.
So he asks the curator about the painting.
M: What does this represent?
C: It's a cow eating grass.
M: But where's the grass?
C: The cow has eaten all the grass.
M: Oh I see, but I don't see the cow.
Where is it?
C: It ate all the grass, so it's gone.
