> Though, the fact that he jumped to this 'lowering the bar' line of thinking shows to me that he was fishing for a conclusion.
Let's focus on things we can actually know rather than speculating about Damore's state of mind.
I'd ask a few questions about this interview practice though.
1) Is this the entirety of Google's diversity practices in hiring? I'd be surprised if it is. So even if this isn't lowering the bar it still doesn't prove conclusively that's not what they're doing. Again I'd like to see a more complete accounting of what exactly it is they do. However, I'm certainly not saying that you need to provide this in order to have a legitimate argument, you don't have access to this information any more than I do.
2) This practice seems to have a somewhat narrow view of what a interviewer bias looks like. In particular it only tries to eliminate bias in the case of a minority being rejected. What would happen if we were to instead attempt to detect interviewers who were prone to bias by randomly giving rejected candidates second interviews and seeing which interviewers wound up frequently disagreeing with their peers? If the assumption that bias only effects minority candidates is true this would have much the same effect.
3) What if it wasn't a second chance but 100 chances? I.e. if you're a minority you get to interview for Google 100 times and if any of those say yes your in. White people only get 1 shot. Unless you think Google's false positive rate is 0, this would have to lower the bar wouldn't it?