THE MOST HAUNTING IMAGE from “Possibilities for a Non-Alienated Life,” Anita Dube’s strong, sensitive exhibition constituting the fourth edition of the Kochi-Muziris Biennale, is an old photograph that appears nowhere in the show itself but accompanied virtually all of the early press releases announcing the event. The image is undated and the author is unknown. Shot in what looks like an abandoned field or parade ground, it captures the wildly engaging forms of artist K. P. Krishnakumar’s Boy Listening, 1985. Made of painted plaster, cloth, and fiberglass, the otherworldly sculpture groups