'Ascertain' in the Bible

But some in the crowd were shouting one thing and others something else; and since he could not determine the facts because of the uproar, he ordered that Paul be taken to the barracks [in the tower of Antonia].

the chiliarch commanded him to be brought into the fortress, saying that he should be examined by scourging, that he might ascertain for what cause they cried thus against him.

“And wanting to ascertain the charge for which they were accusing him, I brought him down to their Council;

ordering his accusers to come before you.] By examining him yourself concerning all these matters you will be able to ascertain the things of which we accuse him.”

You can ascertain that {it has not been more than} twelve days {since} I went up to Jerusalem to worship.