What if one of the most onerous online learning tasks - content moderation in online forums - could be farmed out to a machine? According to this article, that's exactly what Whisper has done. Whisper - an app that allows people to share secrets anonymously - is particularly vulnerable to abuse. "But the company has a secret weapon: The Arbiter, a piece of software that uses the artificial intelligence techniques known as deep learning to moderate content in the same way a human would, only faster and at far greater scale." The Whisper philosophy - "don't be mean, don't be gross, and don't use Whisper to break the law" - can't be enfoced simply by banning a few words. It takes a neural network intelligence to recognize inappropriate messages.