adjective/inkontɾobeɾˈtible/
undisputable
“Tras los dogmas incontrovertibles del nuevo régimen advierte no obstante, sagazmente, el influjo de la ortodoxia religiosa bizantina: el viejo credo de un solo poder y una sola fe.” — Behind the undisputable dogmas of the new regime, however, he shrewdly notes the influence of Byzantine religious orthodoxy: the old creed of one power and one faith.
Related: incontrovertiblemente
From in- + controvertible.