"Brittle" is easy to explain: they're wrong in ways that a human would not be wrong. That goes for both rule-based systems and deep neural nets. Humans are in

"Brittle" is easy to explain: they're wrong in ways that a human would not be wrong. That goes for both rule-based systems and deep neural nets. Humans are inherently social; we have a model of how other humans behave which is essential to getting things done. It doesn't involve say mistaking a bunch of white noise for a camel. For another example, when you're driving, don't underestimate how many of the rules are not written down and involve a model of what the other driver (human) might do. Those rules are also specific to a geographic area and evolve (slowly and imperceptibly) over time. The question "Is this person going to be surprised by what I do?" is inherently different than "Is this object a cyclist?"