Recently I had a candidate who essentially had no idea what I was talking about. They had never checked out a book from a library.
I guess I shouldn't have been surprised, but I still was.
Are you looking for someone who will follow orders, or looking for someone who will challenge them?
I suspect no one has brought it up, but wonder if any have decided to not bring it up for worry that a challenge would risk their chance of being hired.
I wouldn't see it as a challenge, as it has nothing to do with the task at hand. If they said "I don't want to do this exercise, because I don't believe in library fines," that might hurt their chances.
My comment was more about being surprised that they had never checked out a book from a library, since I thought that was a fairly universal experience, at least for software engineers, but going forward I don't think I'll assume that.