Chworktap was a protein robot and was complete in every way. If Chworktap hadn’t mentioned the fact, Simon might not have caught on right away. But Chworktap told Simon of her physiology soon after their first liaison.
“Chworktap certainly wasn’t like any robot he had ever met. Robots were prefect within their limitations, which were exactly known. Robots had no potentiality for mutation. Humans were badly flawed, flawed physically because of genetic mutations, flawed mentally and emotionally because of a flawed and mutating society.”
Venus on a Half-Shell, Philip Jose Farmer