If Norris asserts a claim based on defamation against Josephs, will Norris prevail?
No, if Josephs had reasonable grounds for his belief that Norris was not competent.
Yes, because Josephs was mistaken in the facts on which he based his opinion of Norris's competence. 
Yes, because the statement of Josephs reflected adversely on Norris's professional competence. 
No, if Norris authorized Hospital to make inquiry of her former employer. 