Obviously, they learned from people. That could also be why they sound so confident even when their wrong, people online sound incredibly confident, even when we're debating topics we know nothing about.

And yet, we’re all still employed, so obviously these systems are not yet analogous to humans. They mirror human behavior in some cases because they’ve been trained on almost every piece of text produced by human beings that we have access to, and they still aren’t as capable as the average person.