Final answer:
The black box problem refers to the situation when a deployed model's decision-making process is not transparent or easily understood.
Step-by-step explanation:
The black box problem refers to the situation when a model is deployed, but researchers are unable to figure out why it's making decisions. It is called a 'black box' because the inner workings of the model are not transparent or easily understandable. This lack of transparency can be a challenge when trying to trust and interpret the outputs of the model.