Gallery group shows, especially big, sprawling affairs, can often be disjointed, totally hit or miss, leaving the viewer feeling unsure of the curatorial intention beyond shrewd or blatant commercial motivations. This definitely wasn’t the case with “The Uncertain, or the Shelved . . . ”. Conceived and curated by the Chinese Conceptual and installation artist Shi Yong, with considerable input from the participating artists, this exhibition posed the question of what artists might do when nobody is looking—that is, when experimentation and uncertainty drive the process and become the essential