assume every time you hit a googlebook server they assign a confidence score related to potential identity or demographic and rank. "what are the odds this is

assume every time you hit a googlebook server they assign a confidence score related to potential identity or demographic and rank. "what are the odds this is a woman? a doctor? a person living in Louisville? Is this Jane Doe?" each of the answers to those questions get a confidence score and a rank. then you're shown ads based on whichever verticals you rank the highest. I think it just means their statistical approximations are getting good. theories idk