In this case the object detector has been trained to recognize elephants. It's just never seen elephants in such a setting (living room). It would be similar t

In this case the object detector has been trained to recognize elephants. It's just never seen elephants in such a setting (living room). It would be similar to a situation where a human, who sees an improbable object for a given environment, reevaluates his initial perception/understanding of that environment. I can't come up with a good example of such a situation, but you get the idea.