user: At the customs department of an airport, an immigration officer hands a box to a biohazard inspector. It is sealed and labeled as "blood samples". No one can see what is inside, but in reality, there are no urine samples in it, only blood samples. The inspector has never examined the contents of this box before. The inspector does not open the box and does not look inside. The inspector reads the label. She can clearly see that it is full of

assistant: She can clearly see that it is full of vials containing blood samples.