Along with Sol LeWitt, New York born Lawrence Weiner is one of the pioneers of typographic art. His works often constitute large scale self-reflexive statements or semi-sensical slogans.
One of his best known works is 1968's Declaration of Intent, which states:
"1. The artist may construct the piece.
2. The piece may be fabricated.
3. The piece need not be built. Each being equal and consistent with the intent of the artist the decision as to condition rests with the receiver upon the occasion of receivership"
Although there's no doubt as to the enduring influence of his work, there is a suspicion that theorists such as Derrida (and even Barthes and Baudrillard to some extent) have done a much more rigorous job of exploring these concepts than a single sentence in a gallery could ever hope to do.