Or has he?  Prof. Hawking had bet Neil Turok, the director of the Perimeter Institute in Canada, that gravitational waves from the cosmic big bang would eventually be detected.  But according to this report in The Guardian, Dr. Turok refuses to pay up … for now.  In the event the disagreement over this physics bet goes unresolved, who has the authority to enforce the terms of the wager or decide who the winner is?  Also, what law would apply to this transnational bet–international law, UK law, or Canadian law?