debunker

plural debunkers

1. Someone who debunks.

   Philip J. Klass belonged to the small and somewhat peculiar class of individuals known as debunkers.

   2005 December 25, Michael Sokolove, “The Debunker”, in The New York Times Magazine

   2 more examples

   Interest Rate Observer, and a debunker of U.S. stocks since the Dow was at 2,000, has appeared on Rukeyser's TV show, where he gets bear-baited: "World's going to hell again, eh, Jim?"

   2000, John Rothchild, The Bear Book: Survive and Profit in Ferocious Markets, page 19

   Still, something strange was afoot in Rendlesham, and even if the file is unlikely to satisfy either ufologists or debunkers, it suggests that the truth is still out there.

   2002 December 8, Scott Veale, “Word for Word/The Rendlesham File; Let There Be Lights: Britons Get One Less Thing to Worry About”, in The New York Times