Except that failure is a CNS phenomenon, not muscular. Your Prof. sounds like a HIT guy. Notoriously dogmatic. Read this: http://www.elitefitness.com/forum/showpost.php?p=5088668&postcount=783
Do you truly believe this?
And I love this:
Ummm, maybe because the preponderance of resistance-training studies use untrained subjects, or for very short timeframes (<6 weeks or so). But that isn't really the demographic here.