Google employee James Damore has been reportedly fired for “perpetuating gender stereotypes.” The senior software engineer authored a 10-page “manifesto” condemning Google’s diversity efforts and claiming men are biologically more predisposed to working in the tech industry than women. In an internal memo to Google employees, CEO Sundar Pichai says he has cut his family vacation short to return to work and tackle the issues raised in the manifesto.

Arguing that “much of what was in that memo is fair to debate,” Pichai notes that part of the screed crossed the line “by advancing harmful gender stereotypes in our workplace.” Specifically, Pichai says “To suggest a group of our colleagues have traits that make them less biologically suited to that work is offensive and not OK.”

Pichai will now face the difficult task of balancing what he calls strong support of “the right of Googlers to express themselves,” against those who violate the company’s code of conduct in the process. While a large majority of Google employees reportedly expressed disgust at Damore’s internal document, not all employees disagreed with it. “Clearly there’s a lot more to discuss as a group,” says Pichai, “including how we create a more inclusive environment for all.” You can read Sundar Pichai’s full memo, below: