AI’s future needs safety, not a catchy 2000s tech slogan, says the co-CEO of Waymo.

“In Silicon Valley, there’s a common mantra to ‘move fast and break things,'” Dmitri Dolgov said at a Y Combinator talk released on Monday. “However, when you’re dealing with atoms instead of bits, breaking things is not really okay.”

Waymo was spun out of Google’s self-driving car project in 2016 but remains owned by Alphabet. Dolgov, who has worked on the project since 2009, shared his version of Mark Zuckerberg’s original mantra, which guided Facebook during its hyper-growth years.

Dolgov’s version applies to physical AI, where the stakes are high, he said.

“So…