Yet in judge-only trials the judge is allowed to know the defendants criminal history. How are they able to overcome this bias? The whole reason for the need o

Yet in judge-only trials the judge is allowed to know the defendants criminal history. How are they able to overcome this bias? The whole reason for the need of this rule is we actively select the dullest of our communities to sit on juries. As the saying goes if you are guilty you want a jury trial and if innocent a judge-only trial.