How to respond to a series of defiantly persistent evidence-free claims?
It's also not an argument, let alone an argument from authority. It's a claim.
Also, your edit of my statement changes the actual meaning of the statement, it doesn't clarify it in any way. I said what I meant and was more correct in that instance.
Argument from authority has to do with the authority, not the statement by the authority. Your edit demonstrates a fundamental failure to grasp what "argument from authority" really means.