I don’t understand very much about the Cars universe. I don’t understand its rules. Do the sentient cars feel pain? What part of them needs to “die” in order for them to die? … It raises questions about sentience in a Blade Runner sort of way. It invites speculation that this is all a post-apocalyptic nightmare in which our “smart” cars have either outlasted, or outwitted, their primate creators. I wonder, too, about how they reproduce, as these films have always been clear that there are “children” in this universe. Or are they like child vampires: wizened monsters trapped in infant chassis? When I look at a sentient ambulance in this one’s central “Flesh Fair” demolition-derby sequence and how its patient bay is built for a human-sized customer and not a car, well…it raises questions. And let’s talk about the idea of a demolition derby in a film populated entirely by thinking, feeling cars. What would the human equivalent to this be? Thunderdome? It’s worth a conversation, though it’s not the conversation Cars 3 wants to have.