We’re used to think we need to design devices or interfaces that help the user achieve a goal without any friction. Under this “Don’t make me think” motto, even if we call it a Human Centred Design, sometimes we forget to take into consideration how the human brain really works.
When we perceive that a user is thinking differently than we expected we call it a bias. So bias has become another word for error, but a kind of error which existence we are often not willing to accept and, moreover, an existence we unconsciously deny. The real error, though, lies in this negation and we cannot have a true Human Centred Design until we acknowledge such behaviours as normal, good and not evil.