Impossible to face

Today, at the branch where I was working, I was sitting at my desk, evaluating books for condition when the Circulation supervisor looked over at me from her desk a few feet away, and I heard her saying, “..you are in the library, where are you?”
She got off the phone and said to me, “someone just called from the computers, they want you to come over and help them.”
Infirmed, nope.
Old, nope.