As far as I know (only as a regular Jeopardy! viewer), it’s fine to simply give the answer, without needing to say “What is”. I think it’s also cooler, although few contestants actually do this.
I always thought it would be fun to go on Jeopardy and use an incorrect form of the question. Like, if the clue was: This is our nation’s capital, I would say: Who is Washington D.C.?
No, It’s not a valid response. They let you get away with it once, in the first round, and if you continue doing it, you get it wrong.
I’ve seen a guy in the Tournament of Champions lose something like $8000 on a Daily Double for not answering in the form of a question. It absolutely is a rule and that’s why they all do it.
I think Dewey was talking about responses that are themselves in the form of a question, such as “Who Are You?” as mentioned in the OP.
So “Who Are You?” would be valid because it’s already a question. (Has this particular situation come up more than once in a show, where someone answered with the question-that’s-already-a-question more than once and got dinged for it the second time? Seems unlikely.)
They tend not to be too picky about the format of a question/response. As long as the response is a question of some kind, they tend not to care if the “question” really makes sense in tandem with the answer.
Years ago, when Gene Shalit was a celebrity guest, he put all his question/reponses in silly formats. If the desired response was George Washington, rather than say “Who is George Washington,” he’d say, “Has anybody seen George Washington?” Such replies were always accepted, if correct.
Well, I wondered. In all the years I’ve been watching, they’ve always couched the question inside another question. What is “Have you any wool?” What is “Who’s on first?” What is “Quo vadis?” What is “What, me worry?” What is “Do you know the way to San Jose?” etc., etc.
Though it doesn’t necessarily say anything about the rules; just that contestants are really careful to make sure there’s nothing they could get dinged on.
But my GUESS is that you have to put it in the “double question” format. The basis of my theory is a memory of a long-ago category in which all of the correct responses were movie titles in the form of questions. Such a category is less entertaining if you didn’t have to make it a double question.
When watching at home with my dad, he would always admonish me for blurting out the answer without putting it in the form of a question, even in our own living room! Mainly because he kept to the rules, and it would take him longer to say the same answer (if we both knew it).
ISTR a category entilted “How To” or something similar. Alex would give clues like: 1. Step one: Pour two shots of gin. Step 2: Pour one shot of Vermouth. Step 3: Shake it, don’t stir it, and the contestant would respond “What is How do you make a martini?” instead of just “How do you make a martini?”
I remember at least one instance of a contestant replying with a plain question and not a question within a question and getting credited with a correct response.
I remember in college we had a professor who loved Jeopardy.
He gave pop quizes in Jeopardy form, and you had to answer in a question, which I always forgot to do. So I would always end up answering something like “James Buchannon… is Who?”
He didn’t really like it, but gave me credit reluctantly. I have no idea if Alex would take it however.
My favorite was when a guy hit the daily double he said “I’ve always wanted to say this, Alex…there was a pause and he says " I’d like to solve the puzzle.”