Where someone attempts to invalidate anything that’s problematic to their narrative and/or would trigger cognitive dissonance. Conspiracy theorists do this a lot, but so do your garden-variety bigot: when you’re outed as a drug addict, anyone can literally accuse you of anything, because no matter what you say or how stupid the accusation is, “junkies will do or say anything for dope,” “well of course junkies lie,” and “maybe you don’t remember because you were tweaking hard.”