"credible proof" is a grammatically correct and commonly used phrase in written English.
It refers to evidence or information that is considered reliable and trustworthy. Example: The lawyer presented credible proof that the defendant was not at the scene of the crime at the time it was committed.
He insisted there was not a "single credible proof" Iran was developing weapons.
Other parents say they will wait for the I.N.S. to produce credible proof before accepting the U.S. government's allegations.
The call for a "data revolution" is not empty rhetoric; evidence-based decisions can only be made with credible proof.
Although the rebels have not offered credible proof, that claim is nonetheless the basis of an investigation by the International Criminal Court.
Human Rights Watch said it had credible proof that Shahzad had been abducted by Inter-Services Intelligence, the military's top spy agency.
The Iranian president said the United States and its allies had failed to provide a "single credible proof" of allegations that Tehran was hiding an attempt to develop a nuclear bomb of its own,.
Responding to Angela Merkel, the German Chancellor, who said that she was "not just appalled but horrified" by Russian attacks on civilians, Kremlin spokesman Dmitry Peskov said: "Despite a huge number of such statements, no one up to now has presented a single [piece of] credible evidence as proof of these words".
To establish trust, a good sales person will provide independent, credible, third-party proof to support each answer.
Since good sales people know that the sales profession is not widely trusted by buyers, they provide independent, credible 3rd party proof to support their answers.
If he really wants to win the presidential nomination, he needs to stop attacking people with innuendos and start providing independent, credible, 3rd-party proof to support his claims.
In a commercial setting, casting Julia Roberts proved to be box-office gold, even if she was somewhat overmatched by the material, but she was not a ludicrous choice; at the not-for-profit Roundabout, also on Broadway, Anne Heche proved herself a superb stage comedienne with Twentieth Century, following her very credible turn in Proof, before which her prior stage experience was in high school.
