A new Jackson Pollock exhibition in Boston’s McMullen Museum, with paintings of questionable authenticity, is stirring some controversy in the art world. Luckily, Resident Expert John Hodgman is here to tell us how to spot the difference between the splatters of paint made by a forger and the intentional dripping technique of a genius. Rather than study the chaotic swirls of Pollock paintings, said to display the properties of mathematical fractals, Hodgman has a much more hands-on approach. He demonstrates this amazing skill of detection on Pollock’s No. 5, 1948. Brilliant points are actually made by Hodgman, who explains that the importance of an original piece is not just in its historical significance, but in the fact that you can own and horde that piece of history for yourself.