Bill Gates - Computers don't know how to represent knowledge (2017)

In Bill Gates 2017 Reddit AMA, when asked "What kind of technological advancement do you wish to see in your lifetime?"

The answer is what LLMs can do for us today: "The big milestone is when computers can read and understand information like humans do. There is a lot of work going on in this field - Google, Microsoft, Facebook, academia,... Right now computers don't know how to represent knowledge so they can't read a text book and pass a test. "