stumper

In the new book, reader “Josh of Woonsocket, R.I.” poses the potential stumper: “Has humanity produced enough paint to cover the entire land area of the Earth?”

But he couldn’t resist the allure of this scientific stumper.

"I know who I want for all the judges and propositions. But president . . . that's a stumper," Homer says as he stares at the ballot.

Holznagel: Final Jeopardy! was a triple stumper about the title of a Sean O’Casey play “The Plough and the Stars.”

Mr. Trebek, for his part, emitted few if any exclamations as he led contestants through the first round of clues; then a second, higher-stakes round dubbed “Double Jeopardy!”; and then “Final Jeopardy!,” in which players could wager all or some of their earnings on a single stumper.