[crispyambulance]

It is not objectively possible.

You can't _really_ tell, in advance, if one candidate or another is better suited. Sure, a "D" student who failed at the white-board is probably not a good choice compared to an "A" student who aced the whiteboard... usually.

But what we're talking about here, at worst, is relatively minor differences in a female vs male candidate, where the underrepresented gender gets a "boost." In other hiring scenarios, the candidate's professional contacts or school pedigree or family connections may give a similar (or even greater) boost.