The phrase you're looking for is "unfounded accusation". Unless you are the woman in question or you were stalking her 24/7, you can't falsify it.
(This also wasn't the focus of the original blog post at all. To cut a decades-long story short, the reason that particular aspect caught people's attention was because there were a whole bunch of people who already very strongly distrusted the entire gaming press for reasons entirely unrelated to women. Then Reddit started shadowbanning anyone who mentioned the journo's name, hosters were pressured to shut down sites which covered it, the entire gaming press declared gamers as a whole misogynistic scum over it, and every escalation fanned the flames more in typical Streisand-effect fashion. In fact I don't think it was even mentioned in the blog at all, but I could be wrong.)
https://www.mobygames.com/game/browser/depression-quest/cred...
That's a false accusation.
What actually happened was that an angry ex-boyfriend accused her of sleeping with a gaming journalist to get positive reviews. No such positive reviews ever happened. The journalist in question made a single off-handed mention of one of her games (in a non-review context) before they'd ever actually met in person.