When I was in college, expert systems were considered AI. Expert systems can be 100% programmed by a human. As long as they’re making decisions that appear intelligent, they’re AI.
One example of an expert system “AI” is called “game AI.” If a bot in a game appears to be acting similar to a real human, that’s considered AI. Or at least it was when I went to college.
I’m willing to admit that cannibalism and eating spoiled food is a little outside of my comfort zone.