Recommended: Brian O'Doherty review of Victoria Newhouse's book on reading artworks through their surroundings, particularly how singular works look when placed in different museums. (Hat tip JWS.) Newhouse's test cases are the famous Laocoon-and-snakes statue, the Winged Victory of Samothrace, and forty years of Pollock exhibitions.
The article seems especially germane to this post of Paddy Johnson's. An obviously fake Pollock (would he ever make dominant whitish lines that hesitant or obvious? no, he wouldn't) seems even faker with a self-professed hater of abstract art standing next to it, gesturing towards it like a carnival barker.