"... they might develop their own emotional responses. You know: hate, love, fear, anger, envy. So they built in a fail-safe device." "Which is what?" "Four

"... they might develop their own emotional responses. You know: hate, love, fear, anger, envy. So they built in a fail-safe device." "Which is what?" "Four-year life span." --Blade Runner Here, though, the emotional response is our attachment to a Google service.