If your dad picks your nose and he takes out two boogies and eats one boogy, how many boogies does he have left?

In 2008, to celebrate the release of lawrence lessig’s book, bloomsbury academic press hosted a competition called remix the remixer. entrants were asked to find a video, interview, or written work of lessig’s, mash it up with another piece of lessig’s work, and create something new, a video, photo, or text. what is this sort of artistic activity called?