Totally agree.
As for 70%, that's a completely contrived number in this case. Think of it as 90% or whatever line-in-the-sand we need.
So Damore was concerned the bar was being lowered, and was concerned the goal was 50-50 ("Hiring practices which can effectively lower the bar for “diversity” candidates by decreasing the false negative rate" - links to document I don't have access to) ("Differences in distributions of traits between men and women may in part explain why we don't have 50% representation of women in tech and leadership."), which is where I came up with those elements.
>>> Or even just trying to hire more men to create an environment of more diversity among nurses.
I think we agree that it's probably okay to hire extra minority candidates, even for diversity sake. Not sure I'd do it, but I don't have too strong an opinion.
>>> A - Generally no, but if the memo was broadcast to the whole company and touched on this points due to the reasons expressed above - I think its ok for the company to take action in the way it deems appropriate.
This is where we go out of sync. It's my understanding that "broadcast" is a mischaracterization, as the memo wasn't sent to anybody, but posted on a public forum for open discussion. I also understand that google actively discussed such policies as diversity efforts, so I suspect he wasn't the only public memo.
And I also support the notion of at-will-employment in the abstract. That said, in practice when I think I see somebody saying X and getting fired because it's easy to misread X as Y, it scares me.
Regarding B, I guess my point is maybe those two propositions are close in your head ('women on average might not like engineering as much for biological reasons' VS 'women can't be engineers'), but they're miles apart in mine. And it's a scary world to me if you can be fired for saying something that isn't sexist, but seems like it leads to a slippery slope of sexism.