I was on site at a client’s last week to kick-off their training.  At the end of the kick-off I asked each salesperson for their three biggest lessons learned.  One salesperson had difficulty coming up with anything of substance.  It turned out that he was new to sales and when we assessed him two months earlier, our assessment indicated that he was not trainable.  The client wanted him in the program anyway because he had a hunch it would work out.  “Not trainable” manifests in different ways but usually has the same outcome – salespeople don’t improve.