Other tech leaders swear by a culture of disagreement from the top. One of Jeff Bezos's leadership principles is "disagree ...

"Ron Conway and Brian Chesky went so far above and beyond the call of duty that I'm not even sure how to describe it," Altman wrote in his blog.

AlexNet, created by Alex Krizhevsky, Sutskever and Geoffrey Hinton, used a deep convolutional neural network (CNN)—a powerful ...