The arguable fact
I have some sympathy for this kind of construction, 'cause I've done it too:
There's no way to two-step around the fact that season 11 of Dancing with the Stars has arguably been the most controversial in the show's history
—“Why Bristol Palin May Win Dancing with the Stars,” by Monica Rizzo, 22 November 2010
But I try to rewrite it when I notice that I've done it. Because it's an absolute and undeniably certain unquestionable fact that I think maybe possibly this construction is a little bit kind of sort of contradictory and slightly somewhat self-undermining.
Is it a fact or isn't it? If it is, then don't qualify it with uncertainty indicators. And if it's uncertain, then don't call it a fact, and certainly don't emphasize that it's an indisputable fact.