It's that in order for a profession to be considered completely fair with regard to race and gender issues, the makeup of people in that profession must exactly

It's that in order for a profession to be considered completely fair with regard to race and gender issues, the makeup of people in that profession must exactly reflect the proportion of people in the general population. Hmm. No, I don't think that's quite it. I don't think anybody has any illusions about actually achieving that in the near-term, nor anything so simplistic as pass/fail. It'll probably be asymptotic. And, with respect, what you're talking about is so far from reality — like discussing what we'll do with all that extra food when we've solved world hunger — that it's a bit premature (or optimistic, depending on how cynical you are) to discuss exit conditions. Maybe once we're pretty well convinced that racism/sexism doesn't play a dominant role in this, we'll be able to study cultural or socioeconomic factors which influence people's choice of career. But any measurement you try to make now about how or why is going to be dominated by existing bias.