Clearly that suggestion isn’t trying to imply that people don’t actually know who Alex Trebek is.
Surely, I search for people all the time were I don’t yet know who they are, but that’s not the case at all with Alex Trebek, who’s been a TV icon for nearly as long as I’ve been alive.
Before any links about Alex’s death pop up, before his Wikipedia page is visible, and before Jeopardy!’s Twitter page gets any mentions, Google is able to give fans a winking reference to the instantly familiar way that Jeopardy contestants are required to correctly answer clue on the show.