Another word for indubitably

He was indubitably the most extraordinary of all the Catherinian favourites.

After his cousin Gustavus Adolphus, whom in many respects he strikingly resembled, he was indubitably the most amiable and brilliant of all the princes of the House of Vasa.

The sole importance of the crossing of the Berezina lies in the fact that it plainly and indubitably proved the fallacy of all the plans for cutting off the enemy's retreat and the soundness of the only possible line of action--the one Kutuzov and the general mass of the army demanded--namely, simply to follow the enemy up.

The hostilities were later renewed; in 1302 Boniface himself drafted and published the indubitably genuine bull Unam sanctam, one of the strongest official statements of the papal prerogative ever made.

All the grammatically correct texts, together with those portions of the Avesta which have intrinsic worth, especially the metrical passages, are indubitably authentic and taken ad verbum from the original Avesta.