Why AI visionary Andrew Ng teaches humans to teach computers

PALO ALTO, Calif. (AP) — Andrew Ng has led teams at Google and Baidu that have gone on to create self-learning computer programs used by hundreds of millions of people, including email spam filters and touch-screen keyboards that make typing easier by predicting what you might want to say next.

As a way to get machines to learn without supervision, he has trained them to recognize cats in YouTube videos without being told what cats were. And he revolutionized this field, known as artificial intelligence, by adopting graphics chips meant for video games.

To push the boundaries of artificial intelligence further, one of the world's most renowned researchers in the field says many more humans need to get involved.