She 'is' widely/generally 'acknowledged' as one of the world's best chefs. [=many people regard her as one of the world's best chefs]
He refuses to 'acknowledge' the authority of the court. [=he denies that the court has authority]
The players 'acknowledged' their fans by waving their hands and blowing kisses into the crowd.
(..) The fundamental purpose of this contract. Is to allow the submissive to explore her sensuality, and her limits of safeness. The dominant and the submissive agree and acknowledge that all that occurs under the terms of this contract will be consensual, confidential. And subject to the agreed limits (..)2015 Fifty Shades of Grey