2 ideas
She then discovers that her body is a shell around a silvery, insect-like mechanism built to hunt and kill him. She tears free of the woman-shape and pursues him across the country, never able to tell whether her longing for him was her own feeling or her murder programming experienced from the inside.
An agent can have a vivid, sincere inner experience of wanting something without being able to tell whether that want was chosen or installed. Introspection reports what a drive feels like, not where it came from, so love and a kill-order can feel identical from the inside. Self-knowledge therefore needs evidence from outside the feeling, such as the structure of the body or the history of one's making.