PARK CITY, UTAH — Here’s something I didn’t know until a couple of weeks ago: Anyone—can go to the Sundance Film Festival. Even if your only experience with a call sheet is from an—autodialer, or—if you don’t own a single piece of fur (the—festival’s unofficial winter weather accessory). The—closer you get to—the—tail end of Utah’s favorite highfalutin movie party, the easier it is to see what—are often—the year’s most trenchant—films.