I wonder what the Google staff's and consultants' philosophy of epistemology is. What do they mean when they say fact? What assumptions underly that definition? Are they naive positivists or social constructivists? Ultimately, it requires people to decide what constitutes truth, fact, and knowledge - machines are nowhere near being able to do that and perhaps never will. Do they expect to automate this ranking system with an algorithm? I can't wait to see it trip up over criteria-matching random string generators that regurgitate scraped "facts" off the web (by simply following Google's own "fact" ranking results) to push their porn, malware, and sales/scam/phishing sites up to the top of Google's page rankings.
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