В психиатрии- патологическая ложь.https://ru.wikipedia.org/wiki/%D0%9F%D0%B0%D1%82%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F_%D0%BB%D0%BE%D0%B6%D1%8C