Thinking about error in the law -- The unraveling of reasonable doubt -- Fixing the standard of proof -- Innocence, the burden of proof, and the puzzle of affirmative defenses -- Evaluating evidence and procedures -- Silent defendants, silent witnesses, and lobotomized jurors -- Confessions, poison fruit, and other exclusions -- Double jeopardy and false acquittals : letting felons and judges off the hook? -- Dubious motives for flawed rules : the clash between values.