Re: Scientology insider details 'nightmare' childhood They certainly are. Any time a word appears as the 8th definition in the OED, and the latest usage example dates from 1880... well, it's an obscure plural, to say the least. I've only ever seen the word "advices" in pre-1920 texts or very high-level diplomatic memos. And Sci bullshit nonsense crap. Hubbard's vocabulary choices and sentence construction say a lot about what he aspired to be. A 19th century Oxford-educated diplomat and naval officer, from the look of things.