* the problem with storing static example problems in [[spaced repetition software]], because the user will just memorize the answer instead of treating it like a new problem (this problem also arises from the static/non-interactive nature of learning material)
* inferential distance/lack of uniform background of learners (this problem also arises from the difficulty of anticipating the identity of the learner or how they will react); see e.g. "“There are 10 pre-requisites for understanding concept X. Most people have 6 or seven, and then I write a blog post for each of the 10. Most people, most of the time, feel like they’re reading a thing they already know, yet I did have to write all 10 to be able to get everyone to take the step forward together.”"<ref>https://www.greaterwrong.com/posts/Q924oPJzK92FifuFg/write-a-thousand-roads-to-rome/comment/zCSb8aGbfuLeKKwBP</ref>
* there is a kind of "reverse" or "ironic" problem that happens where the explainer ''did'' correctly anticipate a question, but the reader fails to anticipate that the explainer anticipates this, so the reader stops reading as soon as they become confused, when in fact in the next paragraph (or next section or whatever) the question is answered.