A friend of mine once told me about a ride he took on a bus in Los Angeles. Across the aisle, another passenger was looking out the window and engaged in a ferocious debate, stopping every once in a while as if listening to some response. He finally ended it, however, by saying, "Well, what do you know?? You're just a window!" And he was silent for the rest of the trip.
So Kestrel has counterparts out there.