If Jim Jarmusch can be said to have anything as brazenly branded as a catchphrase, it would have to be “I don’t know”. He doesn’t know – because who does? – how to explain what is going on in America now. “Oh God, please. I don’t mind talking about it, I don’t know what to say about it.” On a smaller scale, he doesn’t know what led him to make a film about the clunky workings of family, just that