[ching_wow_ka]

I doubt that it's used in M.

"Why not just build M with neural nets from the beginning? Without the right data, neural nets couldn’t provide a service much more powerful than, well, Siri, and Wit.ai’s tech can get things started with relatively little data. “This is a good way to bootstrap. With a few thousand data-points, you can start to build a model,” Lebrun says. “Then, using this model, you get more data, and once you have about a million data points, you go to Yann and get some deep learning.”" [1]

[1] http://www.wired.com/2015/08/how-facebook-m-works/

[andrewtbham]

That was a month ago... I'm sure they have some data by now or at least a plan on what to do once they get more data.

[Irishsteve]

They are probably using M to get more data to learn from.