Hey, William, let me disagree a bit. Yes,
without duplicate content is a unique content. But not every unique content is high quality. For example I can post here some unique nonsense like:
Haaaaa. Oh and 76432876yeyddhakjhan98d989c987czx97! Hiiiiiiiiiiiiiii. It's unique, but it's not high quality.
Only unique (i.e. without duplicate content) isn't
high quality.