[wutbrodo]

Huh, I used to work next to the Brain team, didn't realize that they started out as Google X.

Per their wiki article:

> Astro Teller has said that Google Brain paid for the entire cost of Google X

even assuming that Waymo has zero expected future profitability.

[jeffbee]

It's kinda weird to think of brain as an X project. DistBelief was developed out in the open in the main source code repo by people you think of as googlers, like Jeff. So what makes it "X"?

[Judgmentality]

A need to justify X's existence?

[jeffbee]

Or Jeff just wanted it that way.

My own personal image of X was that if you had to drive to some old Air Force base to see it, it was X. Since brain was software, it doesn’t fit the model.