"Thorough debunking" means carefully exposing the truth or showing that something is false by providing strong evidence and explanations to disprove it. Full definition
Lots of people still believe these erroneous things about George Washington, even after thorough debunking. (religion.blogs.cnn.com)
(If you'd like a much more thorough debunking of weather - based climate change denial, read this.) (salon.com)
Even my own discussions of this topic give more credibility to the global heating deniers than they really deserve — my own Anti-global heating claims — a reasonably thorough debunking post is devoted expressly to addressing the scientific claims of that tiny, albeit vocal, minority. (scholarsandrogues.com)