I don't really care too much what tools one integrates into their repertoire and I personally think being "good at good" is a valid problem solving skill. By ex

I don't really care too much what tools one integrates into their repertoire and I personally think being "good at good" is a valid problem solving skill. By extension, being "good at llm) seems like a valid skill as well. What I would say is the velocity matters though, so not being confident unless reading a book sounds like an impediment but that could be my own bias. For what it is worth, I could care less if someone can write code to balance a tree in their head. That extends to a large number of competitive coding questions. I would rather someone use a reference than confidently introduce an off by one bug.