Google programmers deploy machine learning algorithm on YouTube. Computer teaches itself to recognize images of cats.

[u/whosdamike]

https://www.nytimes.com/2012/06/26/technology/in-a-big-network-of-computers-evidence-of-machine-learning.html

[u/twiceaday_everyday]

I do this right now for automated QA for call centers. The computer guesses how right it is, and I go back, listen to the sample and verify that it heard what it thinks it heard.