When I did my IOE at a regional, I said to the guy at the end of day 4 (as he was signing me off), "man, on day 1, I thought you might as well fire me, I am never going to get this." He laughed and said, "yeah everybody thinks that." Then he thought for a minute and said,"actually, the guys who think that are fine, I can teach them. The guys who think they know more than me won't listen and have problems."