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https://rflonline.com/2013/09/12/joel-benenson-disagrees-with-some-kantar-study-results-many-tweeters-reveal-locations-rbdr-91213/
Joel Benenson disagrees but knows why 3/4 of U.S. "thinks" polls are biased; Many tweeters unknowingly reveal their physical location (RBDR–9/12/13)