How Machine Learning Trains AI to be Sexist (by Accident)

While scenarios like The Matrix and I, Robot might seem like folly, AI picks up behaviors from we humans. As a result, some AIs adapt based on new information. Others, regrettably, can become racist, murderous, and/or sexist. Can we prevent AIs from learning negative behaviors and traits? If you're a fan of science fiction, you've no doubt seen the movie The Fifth Element.