Remember, Nick is irrational. Trying to reason with him is
pointless. Instead, acknowledge where you may "fall short" and what
you intend to do about it -- work harder, work smarter, work under
closer supervision, whatever.
Then ask if he had to choose between someone who meets his
exacting requirements and someone who can willingly do the job and
better, who would he pick and why? Be ready to make your case. Nick
doesn't do callbacks.