Just imagine that your whole life, you were pretty ordinary at something, like mathematics. You spent years being frustrated, tutored, and being told you could do it if you tried hard enough. Eventually, you accepted you were just never going to understand it beyond a below average level of competence. Now imagine you started a job that included some of those skills you're not good at, but mostly you can get through it because the job demands more from other skills you are good at. Suddenly, they switch jobs on you because this other work has dried up and they...