The phrase "acquired credibility" is correct and usable in written English.
You can use it when discussing the process of gaining trust or respect over time, often in a professional or academic context.
Example: "Through years of dedicated research and consistent results, the scientist has acquired credibility in the field of environmental science."
Alternatives: "gained credibility" or "established credibility".
These are Mafiosi who say, 'I've killed a hundred people and this is how, so now I'm credible.' Having acquired credibility by telling the truth in 100 cases, they can add something untrue in the 101st.
As White demonstrates, he acquired credibility as his pursuers lost theirs: Joseph McCarthy, Vietnam and Watergate proved the government capable of vicious lying and exposed the corruption of Hiss's initial prosecutors, most notably a young congressman, Richard M. Nixon.
One of Shakespeare's most clumsy plot devices suddenly acquires credibility.
Ludo Van der Heyden, who runs a programme on family firms at INSEAD, a business school, tells his students to build careers first outside their family business, so that they acquire credibility.
The coming year is apparently going to be the one when self-help books acquire credibility, something they could surely have achieved a lot sooner without vacuous titles referencing planets, cheese and parachutes.
A study on sterility rumors in Africa asserted that in absence of the truth, rumors acquire credibility[ 25].
(CARE, June 2004) Participants interviewed for both projects explained how acquiring credibility within the host institutions was crucial to the success of the programs.
When music videos became economically marginal, they acquired artistic credibility.
With Mr. Richter and Chuck Close installed as éminences grises, it confirms that photo-realism has finally acquired postmodern credibility, becoming a place where high-mindedness and market can meet.
Garsington acquired critical credibility (and some relief from the complaint that, like all country-house opera, it was nothing more than a diversion for the rich) by staging the British premieres of forgotten Haydn operas and taking up lesser-known works by Rossini and Richard Strauss.
With a more subtle presentation it has acquired a credibility lacking in previous monsters of science fiction.3 Here too, we can make a distinction between two forms: the hero and the collective [20].
