cogent(reasonable and convincing; based on evidence) adjective [UK: ˈkəʊ.dʒənt] [US: ˈkoʊ.dʒənt]
convincing(effective as proof or evidence) adjective [UK: kən.ˈvɪns.ɪŋ] [US: kən.ˈvɪns.ɪŋ]Her explanation was not convincing. = Hennes förklaring var inte övertygande.