Can machines be more creative than humans?

Mario Klingemann, a German artist who uses AI in his work, has radical views on creativity. "Humans are not original," he says. "We only reinvent, make connections between things we have seen." While humans can only build on what we have learned and what others have done before us, "machines can create from scratch". Setting aside whether or not human creativity is limited and indeed what precisely creativity is, it's certainly true that artificial neural networks being developed today work out the rules as they go along, rather than being taught.