>>512874256
>t's called an ad hominem fallacy or, more colloquially, "nitpicking" or "deflection." Specifically, pointing out a spelling error to dodge the substance of an argument is a form of deflection, where you sidestep the main point to focus on a trivial detail in an attempt to save face or undermine your opponent's credibility. There's no precise term exclusively for this spelling-error tactic, but it's often referred to as "grammar policing" or "typo shaming" in informal contexts, especially online.