Just programmers that can't program. Guys with years of experience tucked under their belt who struggle with simple things. I have pair programmed before with a guy to whom it wasn't obvious when to use a foreach loop, and who didn't parse test failure output for hints as to what went wrong. Everything was just a mystery. We'd make a change, test would fail and tell us exactly why (lo and behold, it was the thing we had just changed) and he was unable to find the thing which was broken. It was painful to have to state the obvious (what ought to be obvious to a professional developer) all day long.

Oh, now I get it, thanks. Unfortunately, I don't have an answer to your question.