This seems like a good way to teach about a product or tool (as you promote its use, or in other words, sell it). I can see such advice being useful on today&#x27;s HN, which is full of people who need to sell tech.<p>But really, teaching is not selling. The objectives are different. There may be some overlaps of technique, but it&#x27;s easy to overstate that. It is correspondingly easy to take this advice much too far.<p>For example, teaching which bundles exhortations and moral value judgements might help to improve recall, but it might also be misleading or intensely annoying, and might encourage teachers to suppress facts that don&#x27;t match the intended emotion or message.<p>When you&#x27;re teaching, it&#x27;s just unethical not to strive for some degree of objectivity and encouragement of critical thinking. I won&#x27;t remark on what the ethics are for salesmen because that battle is unwinnable, but surely we can agree that teachers have certain professional obligations.