IS THE CONCEPT ALL THAT’S NEEDED?

IS THE CONCEPT ALL THAT’S NEEDED? If a certificate of instructions for making a drawing constitutes the work of art, is there any need for the physical drawing to be made or for any one in possession of the certificate to see the physical drawing if it is made? The wikipedia article on LeWitt says: “LeWitt’s art is not about the singular hand of the artist; it is the ideas behind the works that surpass each work itself.” I posted here about Damien Hirst’s spot paintings (“The rules for the spot paintings are that they consist of enamel dots on a white background arranged in a grid at intervals equal to the diameter of the dots. No color can be repeated.”) Once I have read the rules for the spot paintings, does seeing one of them—or several of them—add to the experience? And consider Hirst’s famous pickled shark, entitled The Physical Impossibility of Death in the Mind of Someone Living”. Once I have read the title and know that a shark has been pickled, is there any need to see the shark?