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.
それはカプグラ妄想と呼ばれています 他には全く正常なのですが 頭に損傷を負って 昏睡から目覚めます 他は全く正常なのですが 母親の顔を見て 「この女性は母親に瓜二つだが ニセモノだ」 と言うのです