Near the beginning of his opening arguments, David Dahlquist, a lawyer for the US Department of Justice, showed a slide that he described as Google’s “vicious cycle.” It goes like this: Google pays billions of dollars to be the default search engine practically everywhere, thus it gets more search queries, thus it gets better data, thus it is able to improve its results, thus it makes more money, thus it can afford more defaults. Google doesn’t really disagree with this assessment…