The question Difference between UI and UX is an extremely important question, but it's an old cast off from Stack Overflow and has been (mostly) answered by Programmers, not Designers. It was migrated here after it was a dead thread.
The accepted answer shows the inherent problem...on a site for user experience design, the "accepted" definition of UI/UX starts with "So it seems like....". Most of the other answers were from programmers and the asker (who accepted a meh answer) is long gone and doesn't even have an account here.
This is an important question and a good version would be a great resource to point people too. Is it worth reasking and closing this question as a dupe? Or should we Community Wiki and fix the answer where it is? Or is it not worth fussing with at all?