If you want to see the U.S. Constitution, it’s easy – just take a trip to the National Archives where it’s on public display. But what if you want to see the British Constitution? That’s not so easy, because it’s not written down. Or, more properly, much of it is unwritten, and the parts that are written down are spread over many different documents.

If you find this confusing, join the club. Stewart was so confused that he went all the way to the UK to get an explanation from Dan O’Boyle, a law professor from the University of Law in Guildford, England.