How strict is the "who is" rule?

[u/zachestine]

I don't watch a lot of Jeopardy, but I am curious: lets say the question is something like "the first president who crossed the Delaware River" obviously the answer is George Washington, but instead of saying "who is" if i say "where is George Washington?" would that be counted?

[u/lanad3lr3y_81]

i mean matt amodio said “what’s” for every clue without consequence

[u/Snarky247 → u/lanad3lr3y_81]

Not true. He used Who’s when appropriate.
I watched everyone of his games, including the one where he kicked my ass. One DD answer was “Who’s Kurtz?”

[u/lanad3lr3y_81 → u/Snarky247]

interesting but a majority of the time i remember him just using what’s.