Patients with frontal lobe damage may fail to follow social rules, such as not answering a ringing phone in a doctor's office, even though they know the rule is being broken.

“they they just don't follow sort of the social rules but they're there they they haven't lost rules if you ask these patients was that the appropriate thing to do they'll say no they know it's not they know it's appropriate yeah they say no I'm not supposed to answer your phone but oh wow so they know better but they can't control the impulse exactly”