This fear of not hiring the very best explains why everyone in the Valley seems to be interviewing candidates like crazy but nobody is hiring. When I interview I try to tease out potential, and look for signals that show the candidate will work hard and learn fast. Then someone comes in and says, "Well I hazed him and he couldn't implement a red-black tree on a whiteboard. No hire." This mad pickiness causes the mythical "shortage of engineers" meme to spread.