I think "error oracle" is actually a great piece of terminology that really gets to the heart of the nature of the problem. Not as bombastic though!
"doom principle" isn't great either since the first hit points to TFA, second to this very thread, and that article doesn't really use the actual term of art.
Even then it took a page of Oracle errors to get to a single relevant result. Searching "\"error oracle\" cryptography" moves it to the first page in Google and gets a single, relevant result in Brave.