No, a claim of fact was made, that's completely different. The basis for debate and argument is that any claim of fact, when called on, should be backed up by evidence. On the other hand you can say, it's my opinion, I believe, I suspect, as much as you want, but if a claim of of fact is made then it should be backed up by the evidence when called out.Nice copypasta rhetorical device. It is supposed to be for dismissing spurious claims, but can just as easily be used to lazily dismiss any argument you personally disagree with, as in this case.
It's a basic logical fallacy, Hitchen's Razor;
Overview. The concept is named, echoing Occam's razor, for the journalist and writer Christopher Hitchens, who in a 2003 Slate article formulated it thus: "What can be asserted without evidence can be dismissed without evidence".