1. Trial was basically by compurgation, with oath-helpers swearing to or against the veracity of the Alleged offender's oath

2. A second theory is that unanimity arose out of the practice in the ancient mode of trial by compurgation of adding to the original number of 12 compurgators until one party had 12 compurgators supporting his position; the argument is that when this technique of Afforcement was abandoned, the requirement that one side obtain the votes of all 12