This is called the Capgras delusion, and that is a patient, who's otherwise completely normal, has had a head injury, comes out of coma, otherwise completely normal, he looks at his mother and says, "This looks exactly like my mother, this woman, but she's an impostor.
Dette heter "Capgras vrangforestilling", og det er en pasient som er fullstending normal ellers, har hatt en hodeskade, kommer ut av koma, ellers fullstendig normal, han ser moren sin og sier, "Hun her ser akkurat ut som moren min, denne kvinnen, men hun er en bedrager --