Chris Deerin: The art of being happy to call out crap, even $39million-worth

© Guy Bell/ShutterstockMandatory Credit: Photo by Guy Bell/Shutterstock (5624788ag)
CY TWOMBLY Untitled (New York City), 1968 Est on request
Sotheby's Impressionist, Modern, Contemporary art auction preview, London, Britain - 08 Apr 2016
Mandatory Credit: Photo by Guy Bell/Shutterstock (5624788ag) CY TWOMBLY Untitled (New York City), 1968 Est on request Sotheby's Impressionist, Modern, Contemporary art auction preview, London, Britain - 08 Apr 2016