Mrs Stein a rich tourist goes to Paris to see the art galeries. She hired the services of a guide to show her around the Orsay Museum.
"Oh!" said Mrs Stein looking at a painting, "That's a Monet isn't it?"
"No Madame, almost, it's a Manet." replied the guide.
"And that one, it's a Pissaro!"
"Er... no I'm sorry Madame that's a Monet."
"Oh, I see. Now that one that's a Picasso."
".... no Madame, that's a mirror."