"Amazon built an #AI tool to hire people but had to shut it down because it was discriminating against women"
http://uk.businessinsider.com/amazon-built-ai-to-hire-people-discriminated-against-women-2018-10?r=US&IR=T

Pretty sure there is something missing from this article: presumably the system was discriminating against #women because Amazon was discriminating against women. Systems like this learn by example - if it was wrongly classifying women's CVs as "no hire" this was because the training data it was given did the same. The number of women at the company seems like a distraction - this isn't normally something that causes problems with these systems. If women's CVs were all labelled as "hire" in the training set, the system would learn that and mimic it, even if they were rare.

(Note that, I'm not pillorying Amazon for this - I have no reason to believe that employment #discrimination is particularly worse at Amazon than anywhere else. This is proving to be a hard problem to crack even when companies do try.)