I would assume that should be enough to at least believe it in the absence of evidence showing otherwise, but I guess we aren't treating replies in good faith anymore here.
Nothing personal against that specific user at all btw, especially since they recognized it.
It was just more of a personal rant on my part, as I am saddened by slow redditification of HN comments over the years. Higher-trust comment sections is a major part of why I've been enjoying HN for so long, as opposed to many other alternatives.