Even though she thought the informant was untrustworthy, the journalist promised not to reveal his identity so long as the information he provided did not tum out to be false  However, she will publicly reveal the informant' s identity if she is ordered to do so by a judge or her editor  After all, the information concerns safety violations at the power plant
Thus, the journalist will surely reveal the informant' s identity even if the information is accurate
The informant understood, at the time the journalist promised him confidentiality, that she would break this promise if ordered to do so by a judge.