内科医师
They know everything & do nothing.
外科医师
They know nothing，but do everything 。
精神科医师
They know nothing，and they do nothing，but they tell you everything。
政客立委
They know something， promise everything，and do nothing。
律师
They know nothing，they do nothing，but they charge you for everything .
总统
Their left brain has nothing right and their right brain has nothing left。