But my sense is that if the goal of these comments is to reveal ignorance, it just seems better to me to argue for an explicit hypothesis of ignorance, or a mistake in the post.
My sense is the exact opposite. It seems better to act so as to provide concrete evidence of a problem with a post, which stands on its own, than to provide an argument for a problem existing, which can be easily dismissed (ie. show, don’t tell). Especially when your epistemic state is that a problem may not exist, as is the case when you ask a clarifying question and are yet to receive the answer!
My sense is the exact opposite. It seems better to act so as to provide concrete evidence of a problem with a post, which stands on its own, than to provide an argument for a problem existing, which can be easily dismissed (ie. show, don’t tell). Especially when your epistemic state is that a problem may not exist, as is the case when you ask a clarifying question and are yet to receive the answer!