How to teach artificial intelligence and say, "I'm not sure"

Machine learning uses large volumes of data to make predictions about what will occur in the future, based on patterns extracted from past examples. However, a higher or lower degree of certainty always exists for each of these predictions, and this certainty can decrease when the data being used is especially complex. Machines' current ability to learn is present in many aspects of everyday life. Machine learning is behind the recommendations for movies we receive on digital platforms, virtual assistants' ability to recognize speech, or self-driving cars' ability to see the road. But its origin as a branch of artificial intelligence dates began several decades ago.