Yep .. juries don't work because of individual competence of the 12 good men and true - they mostly work because of the group dynamic, the ability of a group to produce an outcome that exceeds an individual response, and the strict control of the court on emotional inputs and relevance of evidence that is presented to the group. The error rate is designed to favour the innocent by about 100/1 with the result that more of the guilty are presumed innocent than is accurate and that is the price we pay to have public connection with the justice system.
It is a constant question of competence but overall it sort of works...
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