I am from Russia (not in local lw.ru). I have read HPMoR at age 12 and it immediately became my favourite book and holds it’s place even now. I find Eliezer Yudkowsky’s views on most things the most convincing of all the other I saw.
More detailed version organized as Shortform comments thread: https://www.lesswrong.com/posts/zbSsSwEfdEuaqCRmz/eniscien-s-shortform?commentId=JtpxcmxMt2ycd4K5s
I guess it is indeed a mistake. I had an unchecked subconscious background assumption on which I blindly relied—that different spellings would fit.
I guess, the right thing to do is reformulate questions and calibration from “what answer is correct” to “what answer the test maker had in the head”. And ok, I think I know now how swarm agents felt.