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IN BILL JAMES' LATEST article, he chuckles about the fact that most people think that he can answer 90% of baseball questions. Or 98%. Or 99.97%. People think that almost all questions -- such as "Is it an advantage to be the team waiting for the other team in the postseason?" -- have definite answers.
One of the reasons people think that, is because (almost) everybody on TV treats (almost) every question that way. As if it has a definite answer. When do you ever ask Tim McCarver that, something like, "are home runs more important in October?," and McCarver just says "I'm sorry. I have no idea."
People complain to James when he says "I'm sorry. I don't know," and they literally point to ESPN. "The guys on ESPN can answer everything."
James not only tells his readers when he doesn't know something -- he also tells his employers that. Usually when they ask him a baseball question, he replies, "I don't know. I'll study the issue."