"We never walk alone" when we are alone we tend to make mistakes than in group. In fractions they are stronger and alone they are weak. Truth is truth and no matter how it is hidden it can never be dismissed. Integrity, virtue and honesty is requied of any man so as when he sees a truth even when alone will prove a point.
Groups can also lead to group think and making mistakes too ;)
I know, but compared to a single individual it is the best.