> UI confusion would be an excuse for an untrained civilian being put on the bridge and told to run the ship, but not for professionals

There are plenty of examples of "UI confusion" causing professionals to make mistakes in all sorts of industries. I'd suggest taking a look at the book "Behind Human Error," for example.

http://www.usabilityfirst.com/glossary/mode-error/index.html https://www.amazon.com/Behind-Human-Error-David-Woods/dp/075...