Some time ago, I confused two people with the same name. I've since split off the extra person and corrected the information for both people, but the "main" person I'm interested in still lists a number of "hints" for the other guy under the "Accepted" tab.
When you ignore a hint, you have the option to "not ignore" it later, but I don't see a corresponding feature for when you accept a hint and want to un-accept it. I've already Googled, and the advice given of removing the sources from the person's Facts and Sources tab doesn't work -- I've already removed all offending source citations.