Meanings of sufficiently credible in English

One of the two sources said Horowitz's investigators appear to have found Steele's information sufficiently credible to have to extend the investigation.

The key here is that if a central bank is sufficiently credible then it should be unnecessary to intervene in the first place.

The latter is just sufficiently credible to make me think at times that I have missed the most brilliant opportunity of my life.

But it comes from a document deemed sufficiently credible by US intelligence agencies that they briefed both President Obama and Trump on its contents.