Neural networks, a kind of machine-learning model, are used to assist humans with a wide range of tasks, from determining whether a person's credit score is high enough to qualify for a loan to determining whether a patient has a particular disease. However, the workings of these models remain largely unknown to researchers. It is still unclear whether a specific model is the best option for a given task. MIT scientists have discovered some solutions. They studied neural networks and demonstrated that, when given a large amount of labeled training data, it is possible to design neural networks so that