Silliman-Braden-Johnson debate on the "Is-Ought Gap"

Here's a link to the May, 2016 T-12 debate on the "is-ought" (natural-normative; description-prescription) problem.  For anyone who wants to dig a bit deeper, I also published an essay many, many years ago defending the dual thesis that the is-ought gap is a permanent fixture of rational argumentation and that there exists an equally unbridgeable "ought-is" gap.  That paper is available on request.