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> because they've literally been picked as the winners by humans at Google

Is there evidence of that in the leaked documents?

Yes, it’s in the linked article.

I read the linked article. It doesn’t say that.

> #4: Employing Quality Rater Feedback

You mean the Search Quality Raters that Google has written about extensively in public[1] including the 170 page quality rater guidelines doc?

This isn't a secret, nor is it the smoking gun you seem to think it is.