Comment by duderific

It would neither improve nor worsen their chances. I'm only looking for their ability to model a software application.

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.