“In the real world, and under the law, we can’t make all the decisions about what uses we allow of that work. There’s a concept called ‘fair use’ – deliberately ignored in the lesson, on the absurd basis that kids can’t understand it – that explicitly allows others to make use of our work in ways we don’t like, or anticipate. Without fair use, creative works would be next to impossible, because we all build on the work of those who came before us.”