Siri, are you artificial intelligence? SIRI: Close enough, I'd say. Artificial intelligence is when humans train computers to recreate the workings of the human brain. AI occurs when machines have learned to recognize enough patterns to be able to make decisions on their own. Episode 4, Artificial Intelligence. So what does that actually look like? Here's how Google uses artificial intelligence to write email replies for you. An email comes in. It says, are you free tomorrow? It moves through the thought vector, which is a black box. And what comes out the other end is the AI response. Yes, what's up? But AI can go horribly wrong. Google was using AI to tag images that were uploaded to the web. Google's AI engine started to tag images of black people as gorillas. The company apologized and said they would fix it. AI is only as good as the patterns we teach it. So if we give it biased, stereotyped, or even racist information, what then? In one study, researchers trained an AI program with 3 million words from Google news articles. This is what they found. The closest word to the query black male, returns assaulted. While the response to white male, is entitled to. If we're not intelligent about how we train our robots, they will perpetuate the worst of human behavior.