“何时为艺术”是美国美学家纳尔逊.古德曼在反思“什么是艺术”的基础上提出的艺术哲学问题,其目的在于解释先锋艺术颠覆传统艺术哲学所带来的理论难题。“何时为艺术”从符号功能的角度重新定义艺术,试图把艺术与科学统一纳入到制造的世界中。这不仅是对艺术定义的一次新尝试,同时也是新实用主义者对艺术与生活相关联的进一步推进和努力。 “When is Art ” is the philosophical question of art proposed by Nelson Goodman on the basis of reflection on “What is art?”, Whose purpose is to explain the theory that avant-garde art subverts the traditional art philosophy problem. “When Art?” Redefines art from the point of view of symbolic functions, attempting to bring the unity of art and science into the world of manufacture. This is not only a new attempt to define art, but also a further push and effort by neo-pragmatists to link art with life.