<p>You can help the asker frame a succinct question. I will sometimes drop a comment like, "Are you asking..." for your example, I might ask, "Are you asking whether the ANOVA and post-hoc tests actually disagree?"</p>

<p>You can encourage them to focus on a specific area of confusion and post follow-up questions if they still don't get it later.</p>

<p>You can ask them to set up a simpler example. For instance this person is clearly overwhelmed by both separation and multiple testing. You can jitter/permute the $Y$ or use example data from another problem to illustrate the problem.</p>

<p>You can point them to site etiquette. The SE forums value a "laser-like focus" on a specific problem in a way that anyone can understand. It is a good motto to encourage.</p>
