We’re told that artists in this year’s Whitney Biennial are “challenging concepts,” “transgressing boundaries,” “blurring lines” and “investigating relationships.” But Ariella Budick has some news for the curators: “There are no boundaries left to transgress. Art can’t be liminal in the absence of the thresholds. How can you challenge conventions that have already been burned beyond recognition? There’s something almost quaint about the use of these cliches. Where have the curators been for the past 20 years?”