A family enters a large store. After browsing for several moments, they purchase some goods and head for the counter at the front of the store.
They notice a robotic seal standing in a corner situated near the counter. It is dressed in a tuxedo and each time goods are packaged the robot nods as if in agreement.
After the third purchase is made, the father asks the counter assistant why the robot nods each time.
The assistant replies, “Isn’t it obvious? It’s our seal of approval.”