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However , it is also clear there are many more forms of coercion in regular use to back up criminal proscriptions than simple imprisonment : fines , community service orders and electronic tagging orders are three examples . This has the advantage of strict logic and theoretically allows for simple enforcement : if documentary proof cannot be provided for the disputed item in books , manuscripts , paintings , etc. clearly dated before 1600 in western Europe , then it will not be allowed . Ruskin ( who taught at Hughes 's Workingman 's College ) defends Turner against charges that he had n't studied nature enough , and he urges beginning artists to become students of nature , but he was hardly , as many have falsely concluded , a theorist of simple realism : he preferred Turner 's late expressionistic visions of mist and fire , and much of his art criticism concerns pictorial composition and elaborate symbolic meanings . The age-old challenge faced by every cancer researcher is one of simple precision : how to selectively target and kill cancerous cells , while causing the minimal amount of collateral damage to healthy cells , the innocent bystanders in this cellular battle . Remember the luminescence of Turner country , mists burning pastels into simple canvas : " Romantic Abstraction , " the art critic claims .