I recall correcting RRN on the rank they used for Vice Admiral Darse Crandall, the current Judge Advocate General. At the time they wrote that he was a Rear Admiral, IIRC. I posted the correction here along with the Admiral's photo. Eventually RRN corrected his rank. I also recall checking other officers and rank mentioned by RRN. My checking was done online, of course, and the information is also readily accessible to RRN. There isn't much more fact checking that can be done with RRN, unfortunately. I do recall that the board tried.
https://www.jag.navy.mil/about/leadership/