There’s a degree to which the story of Chinese artist-activist Ai Weiwei– filtered through the lens of director Allison Klayman– is incomprehensible. Not in terms of our ability to latch onto and absorb the information Klayman conveys to us, mind; referring to craft and technique, Ai Weiwei: Never Sorry has much and more to recommend it. Supporting all of that is the compelling narrative Klayman constructs about Ai’s life, career, and confrontations with Chinese authorities, and that final detail represents the element that makes the film so difficult to process. Ai, perceptive, compassionate, and endlessly clever, lives in a world where creative expression can lead to a person vanishing into…