"How does it feel?" is one way by which to measure a movie. But if you've seen "A Complete Unknown," the Bob Dylan biopic that opened on Christmas Day, you may have left the theater singing to yourself (to the tune of "Like a Rolling Stone"): How much is reeeaaallll?

That is the question I hoped would be answered by a screening of the new Bob Dylan biopic, A Complete Unknown, written and directed by James Mangold and starring Timothée Chalamet as Dylan.

James Mangold's scrappy, semi-unflattering patchwork portrait serves Bob Dylan far better than any fawning hagiography could.