I think handling it straightforwardly would do it.
I hope you’ll understand, we occasionally see people who like to see how close to lines they can get. “This is the line? Let’s see if I can step a micron further…”
Such does irritate us. At least me. And I can see an outcome where someone uses ‘factually incorrect’ with other constructions as a means of making a sideways accusation of lying and hoping to get away with it.
Also, remember, if you think someone is stating something incorrect and repeatedly doing so to disrupt debate you can always report it for review. I, at least, have been willing to intervene in GD and Elections to stop that under a trolling ruling.