The guidelines are specifically this: > Please don't comment on whether someone read an article. "Did you even read the article? It mentions that" can be short

The guidelines are specifically this: > Please don't comment on whether someone read an article. "Did you even read the article? It mentions that" can be shortened to "The article mentions that." In other words, you can point out that the comment contradicts the article (graciously). You're not beholden to still assume they read the article if it's blatantly obvious they did not, and are directly contradicting a key element of the article.