The lesson was that sometimes the interviewee can be more competent than the interviewer and they should run.

Run or email their seniors and ask them if they're hiring for higher-up positions.

But this is connected to another thread on HN about engineer/manager titles and how they basically have no value if you try to compare them between employers.

So nobody can ever hire someone better at particular skills than they are? Oh boy.

Or maybe this: https://news.ycombinator.com/item?id=47247719