It's perfectly possible that Bruce Ivins really is the anthrax attacker -- that he perpetrated the attacks and did so alone. Perhaps the FBI is in possession of mountains of conclusive evidence that, once revealed, will leave no doubt that Ivins is the guilty party. But no rational person could possibly assume that to be the case given the paltry amount of facts -- many of which contradict one another -- that are now known. Several points to note:

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