Here is a headline from Media Matters:
Whenever I see the term “debunked” used in this way I know I’m in enemy territory. “Debunked” is a psy-ops tool. It is to be used in an off hand manner to give the impression that the matter being referred to has been disproved completely and only fools still talk about it. No evidence of the debunking is ever given. The casual use of the term is meant to give the impression that the case has been closed long ago. No evidence is even needed. Only a fool still believes it. Watch for “debunked.” It is a psyops weapon. Note who uses it. In the above case it is being used by a well known enemy organization: Media Matters.