In a jury trial(in the US), the jury decides questions of fact, the judge decides questions of law. In a bench trial, the judge decides both.
The right to a jury trial is an important mitigation to the possibility of a corrupt government. It’s a lot easier to bribe one judge than a whole jury. But jury trials are also a bit of a gamble, as people generally don’t like being forced to sit through a boring trial, and you can get a bunch of idiots on your jury.
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