Mahershala Ali and Stephen Colbert's chat about cloning gets very deep, very fast

What would you do it if you were given the opportunity to clone yourself before you passed away?

That's the ethical dilemma at the centre of Mahershala Ali's new Black Mirror-esque movie Swan Song, but what would the man himself do if he was faced with such a situation?

"You know I've thought about that a lot, and all...