Always be convincing witnesses to the truth.

Neither is a convincing witness, and the Knave does not offer a very good defense.

Eve was to be his alibi and his witness: all the more convincing because she would be an unwilling witness, do you see?

They were very convincing witnesses.

"You're going to make a very convincing witness," admitted Colleen with an encouraging smile.

And George knew who would make the more convincing witness.

Mr. Belli said she was the most convincing witness he had ever seen.

Nor would she have been a convincing witness.

Byron realized she would need independent corroboration, because the victim might not make a convincing witness in a trial.

That is to say, Ksenia Pokrovsky represents our most convincing contemporary witness to the icon's ability to unify Christians of different denominations.