Empiricism: The scientific doctrine stating that all knowledge ultimately comes from sensory experience and observable evidence, rather than intuition or pre-conceived ideas.
What is art for? "L'art pour l'art" wrote Théophile Gautier as a slogan in 1835. And today's bohemians continue to repeat the creed "Art for art's sake." It's a catchy slogan, still what most people unreflectively tell themselves when confronted with the question: "What is the purpose of art?"