That post, more specifically the title, makes no sense
Assessment marks are varied across schools, so its of absolute insignificance knowing what assessment marks someone got to get their UAI
He was talking about raw assessment marks... which, as you would know, are all but discarded in the moderating process... which is dependent on school performance in the HSC exam... so they can't really be compared to the final aligned marks... and, as always, no-one knows anything about the raw exam marks.