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Among them: Sophia, the first robot innovation ambassador for the U.N. Development Program, or UNDP; Grace, described as a health care robot; and Desdemona, a rock star robot. Two, Geminoid and Nadine, resembled their makers.

Organizers said the event at the AI for Good Global Summit was meant to showcase the capabilities, but also the limitations, of robotics and how those technologies could help the U.N.’s sustainable development goals. The media event featured introductions from the robots’ companions or creators, and a round of questions to the robots from reporters.

And while the robots vocalized strong statements — that robots could be more efficient leaders than humans, but wouldn’t take anyone’s job away or stage a rebellion — organizers didn't specify to what extent the answers were scripted or programmed by people.

The summit was meant to showcase “human-machine collaboration,” and some of the robots are capable of producing preprogrammed responses, according to their documentation. The UNDP’s Sophia, for example, sometimes relies on responses scripted by a team of writers at Hanson Robotics, the company’s website shows.

Reporters were asked to speak slowly and clearly when addressing the , and were informed that time lags in responses would be because of the internet connection and not the robots themselves. That didn’t prevent awkward pauses, audio problems and some stilted or inconsistent replies.

Popular tech products such as Apple’s Siri have been using speech recognition technology to respond to relatively simple human queries for more than a decade. But last year’s release of , a chatbot with a strong command of the semantics and syntax of human language, has about the rapid advancement of AI systems.