This is the first time I've heard we're able to see inside the famous "black box" of cybernetic intelligence. Maybe others have peered inside and I don't know about it, but I'm very intrigued by this line in the story. (He's talking about AND-OR-Grammar-nets):
"AOGNets are also more interpretable, meaning users can see how the system reaches its conclusions." -- Tianfu Wu, an assistant professor of electrical and computer engineering at NC State and corresponding author of a paper on the work.
"We found that hierarchical and compositional grammar gave us a simple, elegant way to unify the approaches taken by previous system architectures, and to our best knowledge, it is the first work that makes use of grammar for network generation," Wu says.
Here is the link to the article: https://techxplore.com/news/2019-05-framework-deep-neural-networks.html